Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales (Notes 2 and 12)	$ 21,014	$ 20,604	$ 22,070
Cost of sales (Note 2)	10,948	8,426	7,891
Gross profit	10,066	12,178	14,179
Operating expenses:
Sales and marketing	7,084	7,698	8,965
Administrative	5,063	6,986	8,143
Research and development (Note 2)	575	1,078	1,322
Impairment charge (Note 10)			3,577
Total operating expense	12,722	15,762	22,007
Loss from operations	(2,656)	(3,584)	(7,828)
Interest income	1	2	4
Interest expense (Note 5)	(213)	(18)	(10)
Loss from operations before taxes	(2,868)	(3,600)	(7,834)
Income tax (Note 8)
Net loss	$ (2,868)	$ (3,600)	$ (7,834)
Basic and diluted loss per share:
Net loss	$ (0.17)	$ (0.22)	$ (0.47)
Weighted average common shares outstanding:
Basic and diluted	17,081,000	16,398,000	16,773,000