Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Deferred Commissions (Details)

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Summary of Significant Accounting Policies - Deferred Commissions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Deferred Commissions [Roll Forward]    
Balance, beginning of the period $ 309 $ 369
Deferral of commissions earned 94 171
Recognition of commission expense (193) (231)
Balance, end of the period $ 210 $ 309