Accounts Payable and Accrued Expenses - Schedule of Product Warranty Liability (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accrued warranty reserve, beginning of period	$ 472,000	$ 614,000
Accrual for product warranties issued	118,000	387,000
Product replacements and other warranty expenditures	(48,000)	(245,000)
Expiration of warranties	(92,000)	(248,000)
Accrued warranty reserve, end of period	$ 450,000	$ 508,000