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Description of Business and Summary of Significant Accounting Policies - Stock-based compensation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Description of Business and Summary of Significant Accounting Policies |  |
Direct operating costs | $ 158 | $ 113
Selling and adminstrative expenses | 755 | 723
Total stock-based compensation | $ 913 | $ 836

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- Definition Amount of selling, general and administrative expense classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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