Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial information

	Quarter Ended
	Dec 31, 2019			Sep 30, 2019			Jun 30, 2019			Mar 31, 2019			Dec 31, 2018			Sep 30, 2018 (1)			Jun 30, 2018			Mar 31, 2018 (2)
	(in thousands, except per-share amounts)
Total net revenues	$	26,687		$	28,552		$	27,142		$	31,604		$	32,253		$	31,695		$	29,292		$	32,349
Gross profit (loss)	$	5,522		$	5,907		$	5,384		$	5,757		$	5,640		$	(3,597	)	$	5,527		$	7,690
Net income (loss)	$	(3,177	)	$	(1,739	)	$	(4,953	)	$	(5,360	)	$	(5,285	)	$	(18,036	)	$	(5,217	)	$	(10,279	)
Basic earnings (loss) per share	$	(0.24	)	$	(0.13	)	$	(0.38	)	$	(0.41	)	$	(0.41	)	$	(1.41	)	$	(0.41	)	$	(0.81	)
Diluted earnings (loss) per share	$	(0.24	)	$	(0.13	)	$	(0.38	)	$	(0.41	)	$	(0.41	)	$	(1.41	)	$	(0.41	)	$	(0.81	)