Quarterly report pursuant to Section 13 or 15(d)

Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Liabilities (Details)

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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Accounts payable $ 8,521,000 $ 6,644,000
Accrued warranty 372,000 422,000
Accrued compensation 674,000 870,000
Other current liabilities 113,000 91,000
Accounts payable and accrued expenses $ 9,680,000 $ 8,027,000