Note 16 - Acquisition (Details Textual) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 21, 2017	Mar. 31, 2017	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Line of Credit Facility, Maximum Borrowing Capacity	$ 100,000,000
Business Combination, Acquisition Related Costs			$ 1,480,000		$ 1,480,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Before Tax					6,230,000	$ 14,694,000
Atlas Lighting Products, Inc. [Member]
Business Combination, Consideration Transferred	97,500,000
Payments to Acquire Businesses, Gross	$ 96,900,000
Number of Stock Warrants Issued	200,000		200,000
Warrant Term	5 years
Business Combination, Inventory, Fair Value Adjustment	$ 228,000
Business Combination, Property, Plant, and Equipment, Fair Value Adjustment	526,000
Business Combination, Acquisition Related Costs			$ 1,480,000		1,480,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		$ 6,700,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		$ 1,000,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Before Tax					$ 6,200,000
Atlas Lighting Products, Inc. [Member] | Line of Credit [Member]
Business Combination, Consideration Transferred, Liabilities Incurred	66,000,000
Atlas Lighting Products, Inc. [Member] | Warrant [Member]
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 600,000