Sale of the Services Business, Discontinued Operations - Additional Information (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jul. 21, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss on classification of assets as held for sale				$ 0	$ 1,350,000
Consideration in escrow		$ 500,000		500,000		$ 500,000
Research and development, net		6,659,000	$ 3,282,000	11,402,000	$ 7,069,000
Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Research and development, net		1,177,000		$ 2,198
Research and Development Arrangement [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Services agreement, term				18 months
Minimum purchase obligation		$ 3,300,000		$ 3,300,000
Discontinued Operations, Held-for-sale [Member] | Nonrecurring Adjustment [Member] | Services Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss on classification of assets as held for sale			$ 1,350,000
Discontinued Operations, Disposed of by Sale [Member] | Services Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of Services Business, aggregate purchase price	$ 3,875,000
Working capital adjustment	824,000
Consideration in escrow	$ 500,000
Consideration payable held in escrow, period	12 months
Net cash consideration received at closing	$ 2,549,000