Note 6 - Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

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

	December 31,
	2015			2014
Commercial	$	11,882		$	47,228
U.S. Government		1,454			727
		13,336			47,955
Allowance for doubtful accounts		(942	)		(289	)
	$	12,394		$	47,666