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Summary of Significant Accounting Policies - PP&E (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Property and Equipment          
Gross Property and Equipment $ 6,035,000   $ 6,035,000   $ 5,756,000
Accumulated depreciation and amortization (4,450,000)   (4,450,000)   (4,172,000)
Net Property and Equipment 1,585,000   1,585,000   1,584,000
Depreciation expense 196,000 $ 159,000 390,000 $ 322,000  
Production tooling, machinery and equipment          
Property and Equipment          
Gross Property and Equipment 3,728,000   3,728,000   3,722,000
Office furniture and fixtures          
Property and Equipment          
Gross Property and Equipment 322,000   322,000   145,000
Computer equipment and software          
Property and Equipment          
Gross Property and Equipment 1,279,000   1,279,000   1,233,000
Web development          
Property and Equipment          
Gross Property and Equipment 40,000   40,000   40,000
Leasehold improvements          
Property and Equipment          
Gross Property and Equipment 577,000   577,000    
Construction in-progress          
Property and Equipment          
Gross Property and Equipment $ 89,000   $ 89,000   $ 616,000