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Note 11 - Stockholder's Equity (Details Textual) - USD ($)			3 Months Ended		6 Months Ended
	Apr. 03, 2017	May 09, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Proceeds from Issuance of Common Stock						$ 19,144,000
Allocated Share-based Compensation Expense			$ 1,400,000	$ 400,000	2,000,000	800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized			$ 1,500,000	$ 2,700,000	$ 1,500,000	$ 2,700,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition					2 years 73 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number			500,000		500,000
Former Chief Executive Officer [Member]
Allocated Share-based Compensation Expense			$ 700,000		$ 700,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			102,571		166,410
Warrants to the Lenders Under the Loan Agreement [Member]
Share Price	$ 8.88
Warrants and Rights Outstanding	$ 3,500,000		$ 3,500,000		$ 3,500,000
Warrants to the Lenders Under the Loan Agreement [Member] | Loan and Security Agreement [Member]
Class of Warrant or Right, Term	5 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	1,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 10.25
D.A. Davidson and Co. [Member]
Stock Issued During Period, Shares, New Issues		5,175,000
Share Price		$ 4
Share Price, Net		$ 3.77
Proceeds from Issuance of Common Stock		$ 19,100,000
Tealstone Construction [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	1,882,058
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 17,061,000

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