Income Taxes - Components of Deferred Tax Assets (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 2,760,000	$ 18,950,000
Stock-based compensation	121,000	275,000
Reserves		24,000
Deferred rent	24,000	38,000
Research and development tax credits	166,000	136,000
Total deferred tax assets	3,071,000	19,423,000
Intangible assets	(628,000)	(698,000)
Depreciation	(48,000)	(83,000)
Reserves	(22,000)
Total deferred tax liabilities	(698,000)	(781,000)
Net deferred tax assets	(2,373,000)	18,642,000
Less: Valuation allowance	(2,373,000)	(18,642,000)
Deferred tax assets, net of allowance