Investment in Omnimetrix	6 Months Ended
Jun. 30, 2019
Schedule of Investments [Abstract]
Investment in Omnimetrix	NOTE 3—INVESTMENT IN OMNIMETRIX In 2015, one of the Company’s then-current directors (the “Investor”) acquired a 20% interest in the Company’s OMX Holdings, Inc. subsidiary (“Holdings”) through the purchase of $1,000 of OmniMetrix Preferred Stock (“Preferred Stock”). Holdings is the holder of 100% of the membership interests of OmniMetrix, LLC through which the Company operates its Power Generation and Cathodic Protection monitoring activities. The $1,000 investment by the Investor was recorded as an increase in non-controlling interests. A dividend of 10% per annum accrued on the Preferred Stock. The dividend was payable on the first anniversary of the funding of the investment and quarterly thereafter for so long as the Preferred Stock was outstanding and had not been converted to Common Stock. Through December 31, 2016, a dividend payable of $115 was recorded with respect to the Preferred Stock. On December 31, 2016, the Investor agreed to treat the $115 of accrued dividends and all subsequent accrued and unpaid dividends as a loan to Holdings which bore interest at 8% per year. In December 2016, the Investor provided Holdings with an additional $50 loan under the same terms as the abovementioned accrued dividends. On May 14, 2018, Holdings and the Investor entered into an agreement whereby effective May 1, 2018, the dividend on the Preferred Stock was reduced to 8%. In addition, all the amounts due to the Investor (accrued dividends, loan and accrued interest) and all future dividends that would accrue on the Preferred Stock through June 30, 2020, were to be paid by Holdings pursuant to an agreed-upon payment schedule which was scheduled to end on June 30, 2020. During the three months ended June 30, 2019, the Company accrued $20 for the quarterly dividend. During the six months ended June 30, 2019, the Company accrued $40 for quarterly dividends in the aggregate. At June 30, 2019, the obligation to the Investor was $323, representing unpaid accrued dividends. On July 1, 2019, in accordance with terms established in 2015 at the time of the original investment, the Company repurchased from the Investor the shares of Preferred Stock then held by the Investor for a purchase price of $1,273 (which included the $323 of unpaid accrued dividends through June 30, 2019). The repurchase raised the Company’s ownership in Holdings from 80% to 99%, with the remaining 1% owned by the CEO of OmniMetrix, LLC.

Investment in Omnimetrix

6 Months Ended

Jun. 30, 2019

NOTE 3—INVESTMENT IN OMNIMETRIX

In 2015, one of the Company’s then-current directors (the “Investor”) acquired a 20% interest in the Company’s OMX Holdings, Inc. subsidiary (“Holdings”) through the purchase of $1,000 of OmniMetrix Preferred Stock (“Preferred Stock”). Holdings is the holder of 100% of the membership interests of OmniMetrix, LLC through which the Company operates its Power Generation and Cathodic Protection monitoring activities. The $1,000 investment by the Investor was recorded as an increase in non-controlling interests.

A dividend of 10% per annum accrued on the Preferred Stock. The dividend was payable on the first anniversary of the funding of the investment and quarterly thereafter for so long as the Preferred Stock was outstanding and had not been converted to Common Stock. Through December 31, 2016, a dividend payable of $115 was recorded with respect to the Preferred Stock. On December 31, 2016, the Investor agreed to treat the $115 of accrued dividends and all subsequent accrued and unpaid dividends as a loan to Holdings which bore interest at 8% per year. In December 2016, the Investor provided Holdings with an additional $50 loan under the same terms as the abovementioned accrued dividends.

On May 14, 2018, Holdings and the Investor entered into an agreement whereby effective May 1, 2018, the dividend on the Preferred Stock was reduced to 8%. In addition, all the amounts due to the Investor (accrued dividends, loan and accrued interest) and all future dividends that would accrue on the Preferred Stock through June 30, 2020, were to be paid by Holdings pursuant to an agreed-upon payment schedule which was scheduled to end on June 30, 2020. During the three months ended June 30, 2019, the Company accrued $20 for the quarterly dividend. During the six months ended June 30, 2019, the Company accrued $40 for quarterly dividends in the aggregate. At June 30, 2019, the obligation to the Investor was $323, representing unpaid accrued dividends.

On July 1, 2019, in accordance with terms established in 2015 at the time of the original investment, the Company repurchased from the Investor the shares of Preferred Stock then held by the Investor for a purchase price of $1,273 (which included the $323 of unpaid accrued dividends through June 30, 2019). The repurchase raised the Company’s ownership in Holdings from 80% to 99%, with the remaining 1% owned by the CEO of OmniMetrix, LLC.