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Securities and Equity Investments | 9 Months Ended
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Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract] |
Cost And Equity Method Investments | 7. SECURITIES AND EQUITY INVESTMENTS Our financial instruments consist of cash and cash equivalents, accounts receivable, notes receivable, investments, accounts payable and a loan agreement. We believe that the carrying value of these financial instruments in the accompanying Condensed Consolidated Balance Sheets approximates their fair value due to their short-term nature. Additionally, we have a cost method investment in EnerTech Capital Partners II L.P. (“EnerTech”). We estimate the fair value of our investment in EnerTech (Level 3) using quoted market prices for underlying publicly traded securities, and estimated enterprise values are determined using cash flow projections and market multiples of the und erlying non-public companies. Investment in EnerTech During the nine months ended June 30, 2017, we collected a distribution of $361, redu cing our carrying value. The following table presents the reconciliation of the carrying val ue and unrealized gains to the fair value of the investment in EnerTech as of June 30, 2017 and September 30, 2016:
|  | June 30, |  | September 30,
|  | 2017 |  | 2016
Carrying value |  | $ | 558 |  | $ | 919
Unrealized gains |  |  | 171 |  |  | 159
Fair value |  | $ | 729 |  | $ | 1,078
At each reporting date, the Company performs evaluations of impairment for this investment to determine if any unrealized losses are other-than-temporary. There was no impairment as of June 30, 2017 or September 30, 2016.

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