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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Concentrations (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
Concentrations (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Concentrations
Concentration Risk Percentage	10.00%	10.00%
Purchase
Concentrations
Concentration Risk Percentage	10.00%
Purchase \| Vendor A
Concentrations
Concentration Risk Percentage			33.00%
Purchase \| Vendor B
Concentrations
Concentration Risk Percentage			13.00%	12.00%
Accounts payable
Concentrations
Concentration Risk Percentage	62.00%
Accounts Payable	$ 3,448
Accounts payable \| Vendor A
Concentrations
Accounts Payable			$ 2,918
Accounts payable \| Vendor B
Concentrations
Accounts Payable			$ 368	$ 257