Note 14 - Revenue - Changes in Assets and Liabilities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Contract Liabilities: Deferred Revenue, Balance at beginning of the period
Contract Liabilities: Deferred Revenue, additions	674
Contract Liabilities: Deferred Revenue, deductions	(559)
Contract Liabilities: Deferred Revenue, Balance at the end of the period	115
Contract Liabilities: Accrued Liabilities,Balance at beginning of the period	434
Contract Liabilities: Accrued Liabilities, additions	1,020
Contract Liabilities: Accrued Liabilities, deductions	(1,096)
Contract Liabilities: Accrued Liabilities, Balance at the end of the period	358
Contract Liabilities, Balance at beginning of the period	434
Contract Liabilities, additions	1,694
Contract Liabilities, deductions	(1,655)
Contract Liabilities, Balance at the end of the period	$ 473