Description of business and summary of significant accounting policies - Additional Information (Details) |
3 Months Ended | ||||
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Mar. 31, 2017
USD ($)
segment
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Mar. 31, 2016
USD ($)
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Dec. 31, 2016
USD ($)
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Sep. 30, 2016
USD ($)
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Dec. 31, 2015
USD ($)
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| Debt Instrument [Line Items] | |||||
| Number of Operating Segments | segment | 1 | ||||
| Revenues, Bill And Hold | $ 1,140,699 | $ 140,600 | |||
| Loss on Contracts | 35,285.10 | $ 155,200 | |||
| Allowance for Doubtful Accounts Receivable, Current | $ 30,000 | $ 30,000 | |||
| Inventory Valuation Reserves | $ 230,000 | $ 266,000 | |||
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- Definition Revenues, Bill And Hold No definition available.
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of valuation reserve for inventory. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Losses recognized in the current period on contracts which are expected to generate losses, which are probable and can be reasonably estimated, in a future period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. No definition available.
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