Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Net sales	$ 16,621	$ 6,699	$ 29,766	$ 11,618
Cost of sales	8,990	4,525	16,733	8,022
Gross profit	7,631	2,174	13,033	3,596
Operating expenses:
Product development	657	203	1,200	394
Selling, general, and administrative	3,903	2,533	7,527	4,837
Total operating expenses	4,560	2,736	8,727	5,231
Operating income (loss)	3,071	(562)	4,306	(1,635)
Other expenses (income):
Interest expense	26	28	49	2,646
Other (income) expenses	(25)	33	32	393
Income (loss) from continuing operations before income taxes	3,070	(623)	4,225	(4,674)
Provision for (benefit from) income taxes	923	(1)	913	(2)
Income (loss) from continuing operations	2,147	(622)	3,312	(4,672)
Discontinued operations:
Loss from discontinued operations	0	0	0	(20)
Loss on sale of discontinued operations	(36)	0	(72)	0
Loss from discontinued operations	(36)	0	(72)	(20)
Net income (loss)	$ 2,111	$ (622)	$ 3,240	$ (4,692)
Net income (loss) per share - basic:
From continuing operations (in dollars per share)	$ 0.21	$ (0.08)	$ 0.34	$ (0.72)
From discontinued operations (in dollars per share)	0.00	0.00	(0.01)	0.00
Net income (loss) per share - basic (in dollars per share)	0.21	(0.08)	0.33	(0.72)
Net income (loss) per share - diluted:
From continuing operations (in dollars per share)	0.21	(0.08)	0.33	(0.72)
From discontinued operations (in dollars per share)	0.00	0.00	(0.01)	0.00
Net income (loss) per share - diluted (in dollars per share)	$ 0.21	$ (0.08)	$ 0.32	$ (0.72)
Weighted average shares used in computing net income (loss) per share:
Basic (in shares)	10,019	7,836	9,846	6,512
Diluted (in shares)	10,138	7,836	10,058	6,512