Other Transaction (Details) - ST Engineering Hackney, Inc. $ in Thousands	Oct. 31, 2019 USD ($)
Other Transactions [Line Items]
Cash deposited into escrow	$ 1,000
Shares held in escrow	6,600
Cash payments for acquired assets	7,000
Minimum
Other Transactions [Line Items]
Shares held in escrow	5,280
Maximum
Other Transactions [Line Items]
Shares held in escrow	7,920
First Payment
Other Transactions [Line Items]
Liabilities payable for assets acquired	1,000
Second Payment
Other Transactions [Line Items]
Liabilities payable for assets acquired	$ 6,000
Production payment payable period	45 days
Second Payment | Maximum
Other Transactions [Line Items]
Production payment payable period	105 days