Commitments and Contingencies (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Commitments and Contingencies
Purchase commitments	$ 8,591		$ 8,591
Sales to United States Government	$ 4,749	$ 4,268	$ 6,865	$ 10,845
Percentage of sales	41.90%	43.00%	34.50%	52.10%
Accounts receivable from US government	$ 3,279	$ 589	$ 3,279	$ 589

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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