Description of business and summary of significant accounting policies - Additional Information (Details) |
6 Months Ended | |||
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Jun. 30, 2015
USD ($)
segment
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Jun. 30, 2014
USD ($)
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Dec. 31, 2014
USD ($)
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Jul. 22, 2013
USD ($)
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| Debt Instrument [Line Items] | ||||
| Number of Operating Segments | segment | 1 | |||
| Loss on Contracts | $ 0 | $ 217,000 | ||
| Allowance for Doubtful Accounts Receivable, Current | $ 50,000 | |||
| Goodwill | $ 40,870 | $ 40,870 | ||
| Ilios | ||||
| Debt Instrument [Line Items] | ||||
| Noncontrolling Interest, Ownership Percentage by Parent | 65.00% | |||
| Restricted stock | Ilios | ||||
| Debt Instrument [Line Items] | ||||
| Noncontrolling Interest, Ownership Percentage by Parent | 63.70% | |||
| Chief Executive Officer (John N. Hatsopoulos) | Revolving Credit Facility [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 2,000,000 | $ 1,055,000 | ||
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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 after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. 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 The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available.
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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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