CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Sales		$ 3,672	$ 2,651	$ 10,760	$ 6,576
Cost of sales		1,151	738	3,490	2,314
Gross profit		2,521	1,913	7,270	4,262
Other costs and expenses:
Research and development		613	487	1,890	1,600
Professional services		628	421	1,815	1,291
Salaries and related costs		2,170	1,826	5,785	6,016
Selling, general and administrative		1,898	2,012	6,221	6,003
Total other costs and expenses		5,309	4,746	15,711	14,910
Loss from operations		(2,788)	(2,833)	(8,441)	(10,648)
Interest income (expense), net		105	(36)	33	(103)
Other losses		(868)	0	(868)	0
Change in fair value of derivative liabilities		0	(69)	20	57
Total other expense, net		(763)	(105)	(815)	(46)
Loss from continuing operations before income taxes		(3,551)	(2,938)	(9,256)	(10,694)
Income tax (benefit) expense		(2,408)	6	(2,384)	15
Net loss from continuing operations		(1,143)	(2,944)	(6,872)	(10,709)
Income from discontinued operations, net of tax		540	1,699	5,062	6,471
Gain on sale of the Core Business, net of tax	$ 69,072	69,072	0	69,072	0
Total income from discontinued operations, net of tax		69,612	1,699	74,134	6,471
Net income (loss)		$ 68,469	$ (1,245)	$ 67,262	$ (4,238)
Loss per share from continuing operations
Loss per share from continuing operations, basic		$ (0.03)	$ (0.09)	$ (0.21)	$ (0.35)
Loss per share from continuing operations, diluted		(0.03)	(0.09)	(0.21)	(0.35)
Income per share from discontinued operations
Income per share from discontinued operations, basic		2.09	0.05	2.25	0.21
Income per share from discontinued operations, diluted		1.99	0.05	2.19	0.21
Income (loss) per share
Income (loss) per share, basic		2.06	(0.04)	2.04	(0.14)
Income (loss) per share, diluted		$ 1.96	$ (0.04)	$ 1.98	$ (0.14)
Weighted average number of shares outstanding - basic (in shares)		33,275	31,078	33,014	30,932
Weighted average number of shares outstanding - dilutive (in shares)		34,934	31,078	33,952	30,932