Note 3 - Income Taxes - Reconciliation of the Statutory Federal Income Tax Rate to Qualstar's Effective Rate (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statutory federal income tax benefit	21.00%	21.00%
State income taxes, net of federal income tax benefit	(7.90%)	6.60%
Foreign income taxes, net of federal income tax benefit	(13.20%)
Deferred tax adjustment – NOL	42.60%
Valuation allowance	8.20%	(26.60%)
Other	0.20%	(0.60%)
Effective income tax rate	50.90%	0.40%