Note 10 - Significant Risk Concentrations (Details Textual) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 8,924,000	$ 14,180,000	$ 25,653,000	$ 29,276,000
Accounts Receivable, after Allowance for Credit Loss, Current, Total	6,243,000		6,243,000		$ 9,216,000
Rebate Credits Outstanding	$ 168,000		$ 168,000
Cost of Sales [Member]
Rebates, Allocation Percentage	20.00%	20.00%	20.00%	20.00%
Selling and Marketing Expense [Member]
Rebates, Allocation Percentage	80.00%	80.00%	80.00%	80.00%
Partner Solutions [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 8,110,000	$ 11,684,000	$ 24,015,000	$ 24,785,000
Supplier Concentration Risk [Member] | Revenue Benchmark [Member] | Microsoft Corporation [Member] | Windows IoT Operating Systems [Member]
Concentration Risk, Percentage					79.00%	75.00%
Supplier Concentration Risk [Member] | Revenue Benchmark [Member] | Microsoft Corporation [Member] | Windows IoT Operating Systems [Member] | Partner Solutions [Member]
Concentration Risk, Percentage					3.00%
CCIntegration, Inc [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 1,200,000
CCIntegration, Inc [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member]
Concentration Risk, Percentage	14.00%
Honeywell International, Inc [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total	$ 1,100,000		$ 1,100,000		$ 1,200,000
Honeywell International, Inc [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage			18.00%		13.00%