Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Accounting Policies [Abstract]
Cash, FDIC insured amount	$ 250,000
Cash, held in FDIC insured institutions	192,000		$ 340,000
Allowance for doubtful accounts receivable	972,000		$ 1,028,000
Allowance for sales returns	$ 184,000	$ 86,000