Note 6 - Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
	2018		2017
Accrued litigation settlement	$	-	$	1,760
Accrued interest payable		-		364
Accrued sales tax		435		-
Accrued professional fees		41		288
Accrued travel expenses		74		90
Accrued product warranty costs		272		390
Accrued clinical trial costs		111		57
Accrued restructuring charge		98		98
Other accrued liabilities		418		550
	$	1,449	$	3,597