100000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 100010 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 100020 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 100030 - Statement - Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 100040 - Statement - Consolidated Statements of Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 100050 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Deficit) link:presentationLink link:calculationLink link:definitionLink 100060 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 100070 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 100080 - Disclosure - Revenue Recognition link:presentationLink link:calculationLink link:definitionLink 100090 - Disclosure - Property and Equipment link:presentationLink link:calculationLink link:definitionLink 100100 - Disclosure - Debt Obligations link:presentationLink link:calculationLink link:definitionLink 100110 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 100120 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 100130 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 100140 - Disclosure - Long-Term Incentive Plans link:presentationLink link:calculationLink link:definitionLink 100150 - Disclosure - Stock Compensation Plans link:presentationLink link:calculationLink link:definitionLink 100160 - Disclosure - Employee Benefit Plans link:presentationLink link:calculationLink link:definitionLink 100170 - Disclosure - Fair Value Measurement link:presentationLink link:calculationLink link:definitionLink 100180 - Disclosure - Stock Repurchase Program (Subsequent Event) link:presentationLink link:calculationLink link:definitionLink 100190 - Disclosure - Registered Direct Offering - Common Stock link:presentationLink link:calculationLink link:definitionLink 100200 - Disclosure - Subsequent Event link:presentationLink link:calculationLink link:definitionLink 100210 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 100220 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 100230 - Disclosure - Revenue Recognition (Tables) link:presentationLink link:calculationLink link:definitionLink 100240 - Disclosure - Property and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 100250 - Disclosure - Debt Obligations (Tables) link:presentationLink link:calculationLink link:definitionLink 100260 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 100270 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 100280 - Disclosure - Stock Compensation Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 100290 - Disclosure - Employee Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 100300 - Disclosure - Fair Value Measurement (Tables) link:presentationLink link:calculationLink link:definitionLink 100310 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100320 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Life of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 100330 - Disclosure - Summary of Significant Accounting Policies - Other Comprehensive Income (loss) and Reclassifications from AOCI (Details) link:presentationLink link:calculationLink link:definitionLink 100340 - Disclosure - Summary of Significant Accounting Policies - Other Comprehensive Income (loss) and Reclassifications from AOCI (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 100350 - Disclosure - Summary of Significant Accounting Policies - Reconciliation of Number of Shares Outstanding for Basic and Diluted Earning Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 100360 - Disclosure - Summary of Significant Accounting Policies - Reconciliation of Number of Shares Outstanding for Basic and Diluted Earning Per Share (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 100370 - Disclosure - Summary of Significant Accounting Policies - Potential Common Stock Equivalents Excluded from Computation of Diluted Earning Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 100380 - Disclosure - Summary of Significant Accounting Policies - Valuation Assumptions for Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 100390 - Disclosure - Revenue Recognition - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100400 - Disclosure - Revenue Recognition - Additional Information (Details1) link:presentationLink link:calculationLink link:definitionLink 100410 - Disclosure - Revenue Recognition - Schedule of Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 100420 - Disclosure - Property and Equipment - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 100430 - Disclosure - Property and Equipment - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100440 - Disclosure - Debt Obligations - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100450 - Disclosure - Debt Obligations - Schedule of Borrowings and Repayments under Credit Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 100460 - Disclosure - Leases - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100470 - Disclosure - Leases - Summary of Components of Lease Costs (Details) link:presentationLink link:calculationLink link:definitionLink 100480 - Disclosure - Leases - Supplemental Cash Flow Information Related to Leases (Details) link:presentationLink link:calculationLink link:definitionLink 100490 - Disclosure - Leases - Schedule of Reconciliation of Undiscounted Cash Flows Related to Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 100500 - Disclosure - Income Taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100510 - Disclosure - Income Taxes - Components of Net Deferred Tax Assets (Details) link:presentationLink link:calculationLink link:definitionLink 100520 - Disclosure - Income Taxes - Provision (benefit) for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 100530 - Disclosure - Income Taxes - Reconciliation between Statutory and Effective Income Tax Rates (Details) link:presentationLink link:calculationLink link:definitionLink 100540 - Disclosure - Income Taxes - Reconciliation between Statutory and Effective Income Tax Rates (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 100550 - Disclosure - Income Taxes - Liability for Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 100560 - Disclosure - Commitments and Contingencies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100570 - Disclosure - Leases - Schedule of Reconciliation of Undiscounted Cash Flows Related to Operating Lease Liabilities (Details) 2 link:presentationLink link:calculationLink link:definitionLink 100580 - Disclosure - Long-Term Incentive Plans - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100590 - Disclosure - Stock Compensation Plans - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100600 - Disclosure - Stock Compensation Plans - Stock Option Activity under Two Thousand Six And Two Thousand Sixteen Plan (Details) (Details) link:presentationLink link:calculationLink link:definitionLink 100610 - Disclosure - Stock Compensation Plans - Stock Option Activity under Two Thousand Six And Two Thousand Sixteen Plan (Details) (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 100620 - Disclosure - Stock Compensation Plans - Summary of Activity for Non-Vested Shares under Two Thousand Six, Two Thousand Sixteen Plan And Inducement Awards (Details) link:presentationLink link:calculationLink link:definitionLink 100630 - Disclosure - Stock Compensation Plans - Summary of Activity for Non-Vested Shares under Two Thousand Six, Two Thousand Sixteen Plan And Inducement Awards (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 100640 - Disclosure - Stock Compensation Plans - Common Stock Shares Issued to Non-Employee Directors as Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 100650 - Disclosure - Employee Benefit Plans - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100660 - Disclosure - Employee Benefit Plans - Pension and Retirement Plan's Funded Status (Details) link:presentationLink link:calculationLink link:definitionLink 100670 - Disclosure - Employee Benefit Plans - Total Plan Expense, Other Amounts, and Other Changes Recognized in Accumulated Other Comprehensive Loss (Details) link:presentationLink link:calculationLink link:definitionLink 100680 - Disclosure - Employee Benefit Plans - Schedule of Estimated Future Benefit Payments for Next Ten Fiscal Years (Details) link:presentationLink link:calculationLink link:definitionLink 100690 - Disclosure - Employee Benefit Plans - Fair Value of Noncontributory Defined Benefit Retirement Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 100700 - Disclosure - Employee Benefit Plans - Target Asset Allocation (Details) link:presentationLink link:calculationLink link:definitionLink 100710 - Disclosure - Fair Value Measurement - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100720 - Disclosure - Fair Value Measurement - Fair Value Measured at Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 100730 - Disclosure - Stock Repurchase Program (Subsequent Event) - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink