Note 9 - Acquisition of Business - Preliminary Assignment of Aggregate Consideration (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016	Mar. 08, 2016
Goodwill	$ 11,265,000	$ 11,269,000
BAMKO [Member]
Accounts receivable			$ 4,885,000
Prepaid expenses and other current assets			3,200,000
Inventories			236,000
Property, plant and equipment			199,000
Other assets			100,000
Identifiable intangible assets			11,360,000
Goodwill			6,994,000
Total assets			26,974,000
Accounts payable			1,314,000
Other current liabilities			736,000
Total liabilities			$ 2,050,000