Note 3 - Accounts Receivable, Net (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

	December 31,
(in thousands)	201 6			201 5
Accounts receivable	$	14,050		$	7,372
Less allowance for uncollectible accounts receivable		(785	)		(314	)
Accounts receivable, net	$	13,265		$	7,058

Allowance for Credit Losses on Financing Receivables [Table Text Block]

	December 31,
(in thousands)	201 6			201 5			201 4
Balance at beginning of period	$	(314	)	$	(114	)	$	(165	)
Provision for bad debt expense		(471	)		(200	)		—
Write-off, net of recoveries		—			—			51
Balance at end of period	$	(785	)	$	(314	)	$	(114	)