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Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Purchase of investment Payments to Acquire Investments Name Awards Close in Time to MNPI Disclosures, Individual Name Forfeited, cancelled, or expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Entity Filer Category Entity Filer Category Time-and-materials Time-and-Materials Contract [Member] Schedule of Other Current Liabilities Other Current Liabilities [Table Text Block] Remaining performance obligations Revenue, Remaining Performance Obligation, Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Letter of Credit Letter of Credit [Member] Company Selected Measure Name Company Selected Measure Name