Note 9 - Legal Settlement (Details Textual) $ in Millions						1 Months Ended	3 Months Ended
	May 30, 2014 USD ($)	May 16, 2014 USD ($)	May 15, 2014 USD ($)	Feb. 04, 2014 USD ($)	Apr. 26, 2011 USD ($)	May 31, 2014 USD ($)	Jul. 31, 2014 USD ($)	Apr. 16, 2013 USD ($)	Feb. 29, 2012	Sep. 01, 2011	May 13, 2011 USD ($)
Additional Damages Sought [Member]
Gain Contingency, Unrecorded Amount								$ 15.0
Gross Amount [Member] | Chicony Power Technology Company Ltd [Member]
Litigation Settlement, Amount				$ 10.8
Chicony Power Technology Company Ltd [Member]
Litigation Settlement, Amount			$ 7.6	9.7		$ 7.6
Previously Accrued Seeking Payments				$ 1.1			$ 1.1
Proceeds from Legal Settlements	$ 3.6	$ 4.0
Gain (Loss) Related to Litigation Settlement							$ 7.6
Number of Units Under Indemnity Agreement			500,000
Loss Contingency, Damages Sought, Value					$ 1.2
Loss Contingency Amount Claimed for Recovery of Damages											$ 4.9
Number of Patents Relating to Power Technology										5
Number of Comarco Patents									5