Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accounting Policies [Abstract]
Cash, FDIC insured amount	$ 250,000		$ 250,000
Allowance for doubtful accounts receivable	2,400,000		2,400,000		$ 1,000,000
Provision for sales returns	$ 369,000	$ 197,000	$ 769,000	$ 637,000