Significant Accounting Policies (Narrative) (Details)		12 Months Ended
	Aug. 03, 2015 $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Aug. 02, 2015 shares
Future cash flow discount rate		16.80%
Goodwill impairment charge		$ 7,600,000
Amortization of patents		31,000	$ 31,000
Unrecognized tax benefits		$ 2,100,000	$ 2,100,000
Reverse stock split, description	1-for-50 (1:50) reverse stock split of its common stock, par value $0.01 per share
Conversion ratio of reverse stock split	50
Common stock, shares authorized | shares	670,000,000	670,000,000	670,000,000	445,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01
Patents [Member]
Finite-lived intangible assets, gross		$ 493,000
Amortization of patents		186,000
SPH Intellectual Property [Member]
In-process resesarch and development		5,200,000
Biocontrol Intellectual Property [Member]
In-process resesarch and development		7,300,000
Impairment of in-process research and development		$ 2,000,000
In Process Research and Development [Member]
Discount rate		16.80%
Impairment of in-process research and development		$ 2,000,000