Product warranty - Schedule of Product Warranty Reserve (Details) - USD ($) |
12 Months Ended | |
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Dec. 31, 2015 |
Dec. 31, 2014 |
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| Guarantees [Abstract] | ||
| Product warranty period | 1 year | |
| Schedule of Product Warranty Reserve [Roll Forward] | ||
| Warranty reserve, beginning balance | $ 147,000 | $ 95,000 |
| Warranty provision for units sold | 87,690 | 207,583 |
| Costs of warranty incurred | (124,690) | (155,583) |
| Warranty reserve, ending balance | $ 110,000 | $ 147,000 |
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- Definition Product Warranty Period No definition available.
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- References No definition available.
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Represents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to extended product warranties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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