Investment in Omnimetrix	12 Months Ended
Dec. 31, 2016
Business Combinations [Abstract]
Investment in Omnimetrix	NOTE 6—INVESTMENT IN OMNIMETRIX On October 16, 2015, one of the Company’s directors acquired a 10% interest in the Company’s OmniMetrix Holdings, Inc. subsidiary (“Holdings”) for $500 through the purchase of preferred stock. Holdings is the holder of 100% of the membership interests OmniMetrix, LLC through which the Company operates its M2M and pipeline monitoring activities. In the transaction, the director acquired 1,000 shares of Series A Preferred Stock (the “OmniMetrix Preferred Stock”) of Holdings. Subsequently, on November 23, 2015, the director acquired an additional 1,000 shares of OmniMetrix Preferred Stock for an additional $500. The $1,000 investment by the director has been recorded as an increase in non-controlling interests. A dividend of 10% per annum accrues on the OmniMetrix Preferred Stock. The dividend is payable on the first anniversary of the funding of the investment and quarterly thereafter for so long as the OmniMetrix Preferred Stock is outstanding and has not been converted to Common Stock. The dividend is payable in cash or the form of additional shares of OmniMetrix Preferred Stock at the election of the holder of the Preferred Stock. Through December 31, 2016, a dividend payable of $115 was recorded with respect to the OmniMetrix Preferred Stock. On December 31, 2016, the director agreed to treat the $115 of accrued dividends (and may agree to treat future accrued dividends) as a loan to OmniMetrix which bear interest at 8% per year. All amounts due (principal and interest) are due the later of April 30, 2018 or 90 days following the advance of a new loan (quarterly dividend accrual). In December 2016, the director provided OmniMetrix with a $50 loan under the same terms as the abovementioned accrued dividends. The OmniMetrix Preferred Stock may convert at the option of the holder of the OmniMetrix Preferred Stock on a one-for-one basis into Common Stock, subject to appropriate adjustments for corporate reorganizations, mergers, stock splits, etc. The OmniMetrix Preferred Stock has full ratchet anti-dilution protection and will not be diluted by any issuances below a pre-money equity valuation of $5,500 for OmniMetrix. The Company has the right to drag along the holder of the OmniMetrix Preferred Stock in the event of a sale by Acorn of at least a majority of its shares in OmniMetrix and the holder of the OmniMetrix Preferred Stock has the right to tag along on any such sale.

Investment in Omnimetrix

12 Months Ended

Dec. 31, 2016

NOTE 6—INVESTMENT IN OMNIMETRIX

On October 16, 2015, one of the Company’s directors acquired a 10% interest in the Company’s OmniMetrix Holdings, Inc. subsidiary (“Holdings”) for $500 through the purchase of preferred stock. Holdings is the holder of 100% of the membership interests OmniMetrix, LLC through which the Company operates its M2M and pipeline monitoring activities. In the transaction, the director acquired 1,000 shares of Series A Preferred Stock (the “OmniMetrix Preferred Stock”) of Holdings. Subsequently, on November 23, 2015, the director acquired an additional 1,000 shares of OmniMetrix Preferred Stock for an additional $500. The $1,000 investment by the director has been recorded as an increase in non-controlling interests.

A dividend of 10% per annum accrues on the OmniMetrix Preferred Stock. The dividend is payable on the first anniversary of the funding of the investment and quarterly thereafter for so long as the OmniMetrix Preferred Stock is outstanding and has not been converted to Common Stock. The dividend is payable in cash or the form of additional shares of OmniMetrix Preferred Stock at the election of the holder of the Preferred Stock. Through December 31, 2016, a dividend payable of $115 was recorded with respect to the OmniMetrix Preferred Stock. On December 31, 2016, the director agreed to treat the $115 of accrued dividends (and may agree to treat future accrued dividends) as a loan to OmniMetrix which bear interest at 8% per year. All amounts due (principal and interest) are due the later of April 30, 2018 or 90 days following the advance of a new loan (quarterly dividend accrual). In December 2016, the director provided OmniMetrix with a $50 loan under the same terms as the abovementioned accrued dividends.

The OmniMetrix Preferred Stock may convert at the option of the holder of the OmniMetrix Preferred Stock on a one-for-one basis into Common Stock, subject to appropriate adjustments for corporate reorganizations, mergers, stock splits, etc. The OmniMetrix Preferred Stock has full ratchet anti-dilution protection and will not be diluted by any issuances below a pre-money equity valuation of $5,500 for OmniMetrix.

The Company has the right to drag along the holder of the OmniMetrix Preferred Stock in the event of a sale by Acorn of at least a majority of its shares in OmniMetrix and the holder of the OmniMetrix Preferred Stock has the right to tag along on any such sale.