Commitments and Contingencies (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Commitments and Contingencies
Purchase commitments	$ 13,142		$ 13,142
Sales to United States Government	$ 6,371	$ 8,476	$ 13,237	$ 19,321
Percentage of sales	50.50%	66.40%	39.40%	57.50%
Accounts receivable from US government	$ 5,197	$ 3,261	$ 5,197	$ 3,261

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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