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Organization and Significant Accounting Policies - (Details) - USD ($) $ in Thousands	Sep. 15, 2020	Oct. 30, 2021	Apr. 30, 2021	Sep. 14, 2020	Feb. 19, 2019
Restricted cash		$ 1,823	$ 8,322
Altoy
Ownership interest				85.00%
Toygun Savunma Sanayi ve Havacilik Anonim Sirketi
Percentage of shares sold	35.00%
Toygun Savunma Sanayi ve Havacilik Anonim Sirketi | Altoy
Ownership interest	50.00%
Arcturus UAV Inc.
Ownership interest acquired					100.00%

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