Note 7 - Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Long-term debt	$ 17,059	$ 22,480
Less debt discount	0	(70)
Less current portion	(1,720)	(1,693)
Long-term debt, net of debt discount and current portion	15,339	20,717
Subordinated Promissory Note 1 [Member]
Long-term debt	0	1,250
Real Estate Loan 1 [Member]
Long-term debt	139	167
Vehicle Loans for Trucks [Member]
Long-term debt	0	31
Note Payable To Seller Of Heat Waves [Member]
Long-term debt	0	14
Paycheck Protection Program CARES Act [Member]
Long-term debt	1,940	1,940
Revolving Credit Facility [Member]
Long-term debt	$ 14,980	$ 19,078