Note 9 - Acquisition of Business - Aggregate Consideration (Details) - USD ($) $ in Thousands	Jun. 30, 2018	May 02, 2018	Dec. 31, 2017	Dec. 01, 2017	Mar. 08, 2016
Goodwill, Ending Balance	$ 35,327		$ 16,032
CID Resources [Member]
Cash		$ 1,329
Accounts receivable		9,656
Prepaid expenses and other current assets		1,262
Inventories		30,691
Property, plant and equipment		1,134
Contract assets		2,535
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total		39,087
Goodwill, Ending Balance		19,414
Total assets		105,108
Accounts payable		4,472
Deferred tax liability		8,999
Other current liabilities		948
Total liabilities		$ 14,419
BAMKO [Member]
Accounts receivable					$ 4,885
Prepaid expenses and other current assets					3,200
Inventories					236
Property, plant and equipment					199
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total					11,360
Goodwill, Ending Balance					6,994
Total assets					26,974
Accounts payable					1,314
Other current liabilities					736
Total liabilities					2,050
Other assets					$ 100
Tangerine [Member]
Accounts receivable				$ 5,051
Prepaid expenses and other current assets				969
Property, plant and equipment				131
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total				6,495
Goodwill, Ending Balance				4,169
Total assets				16,815
Accounts payable				3,374
Other current liabilities				1,353
Total liabilities				$ 4,727