RESTATEMENT Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, 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
Error Corrections and Prior Period Adjustments Restatement [Line Items]
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, net		(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
Basic and diluted (in dollars per share)		$ (0.03)		$ (0.21)
Income per share from discontinued operations
Basic (in dollars per share)		2.09	$ 0.05	2.25	$ 0.21
Diluted (in dollars per share)		1.99	0.05	2.19	0.21
Income (loss) per share from all operations
Basic (in dollars per share)		2.06	(0.04)	2.04	(0.14)
Diluted (in dollars per share)		$ 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
As Originally Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		$ 3,672		$ 10,760
Cost of sales		1,151		3,490
Gross profit		2,521		7,270
Other costs and expenses:
Research and development		613		1,890
Professional services		628		1,815
Salaries and related costs		2,119		5,734
Selling, general and administrative		1,957		6,280
Total other costs and expenses		5,317		15,719
Loss from operations		(2,796)		(8,449)
Interest income (expense), net		105		33
Other losses, net		(155)		(155)
Change in fair value of derivative liabilities				20
Total other expense, net		(50)		(102)
Loss from continuing operations before income taxes		(2,846)		(8,551)
Income tax (benefit) expense		(2,408)		(2,384)
Net loss from continuing operations		(438)		(6,167)
Income from discontinued operations, net of tax		540		5,062
Gain on sale of the Core Business, net of tax		69,072		69,072
Total income from discontinued operations, net of tax		69,612		74,134
Net income (loss)		$ 69,174		$ 67,967
Loss per share from continuing operations
Basic and diluted (in dollars per share)		$ (0.01)		$ (0.19)
Income per share from discontinued operations
Basic (in dollars per share)		2.09		2.25
Diluted (in dollars per share)		1.99		2.19
Income (loss) per share from all operations
Basic (in dollars per share)		2.08		2.06
Diluted (in dollars per share)		$ 1.98		$ 2.00
Weighted average number of shares outstanding basic (in shares)		33,275		33,014
Weighted average number of shares outstanding dilutive (in shares)		34,934		33,952
Adjustments | Material Corrections
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		$ 0		$ 0
Cost of sales		0		0
Gross profit		0		0
Other costs and expenses:
Research and development		0		0
Professional services		0		0
Salaries and related costs		51		51
Selling, general and administrative		(59)		(59)
Total other costs and expenses		(8)		(8)
Loss from operations		8		8
Interest income (expense), net		0		0
Other losses, net		(713)		(713)
Change in fair value of derivative liabilities				0
Total other expense, net		(713)		(713)
Loss from continuing operations before income taxes		(705)		(705)
Income tax (benefit) expense		0		0
Net loss from continuing operations		(705)		(705)
Income from discontinued operations, net of tax		0		0
Gain on sale of the Core Business, net of tax		0		0
Total income from discontinued operations, net of tax		0		0
Net income (loss)		$ (705)		$ (705)
Loss per share from continuing operations
Basic and diluted (in dollars per share)		$ (0.02)		$ (0.02)
Income per share from discontinued operations
Basic (in dollars per share)		0.00		0.00
Diluted (in dollars per share)		0.00		0.00
Income (loss) per share from all operations
Basic (in dollars per share)		(0.02)		(0.02)
Diluted (in dollars per share)		$ (0.02)		$ (0.02)
Weighted average number of shares outstanding basic (in shares)		33,275		33,014
Weighted average number of shares outstanding dilutive (in shares)		34,934		33,952