Debt Disclosure Detail - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2020	Mar. 31, 2021	Aug. 31, 2019
Line of Credit Facility [Line Items]
Unrestricted Cash And Cash Equivalents Minimum Amount Required		$ 1,500
Other Current Assets [Member]
Line of Credit Facility [Line Items]
Unamortized Debt Issuance Expense		$ 100
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 2,900
Debt instrument, term		2 years
Debt instrument rate		1.00%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 6,500	$ 10,000
Letters of Credit Outstanding, Amount		$ 1,000
Debt Instrument, Description of Variable Rate Basis		3.25
Debt Issuance Costs, Line of Credit Arrangements, Gross			$ 600
Revolving Credit Facility [Member] | Prime Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.50%