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Supplemental Financial Information | 6 Months Ended
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Jun. 30, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Supplemental Financial Information | Supplemental Financial Information Supplemental Balance Sheet Information The following table summarizes the components of Prepaid expenses and other assets and Other long-term assets as presented in the Condensed Consolidated Balance Sheets:
|  | As of
(in thousands) | June 30, 2017 |  | December 31, 2016
Prepaid expenses and other assets: |  |  |  |
Prepaid expenses |  | $ | 1,658 |  |  | $ | 1,169 |
Other |  | 78 |  |  | 188 |
|  | $ | 1,736 |  |  | $ | 1,357 |
Other long-term assets: |  |  |  |
Deposits |  | $ | 223 |  |  | $ | 263 |
Intangibles |  | 758 |  |  | 696 |
Other |  | 730 |  |  | 323 |
|  | $ | 1,711 |  |  | $ | 1,282 |
The following table details the components of Other current liabilities and Other long-term liabilities as presented in the Condensed Consolidated Balance Sheets:
|  | As of
(in thousands) |  | June 30, 2017 |  | December 31, 2016
Other current liabilities: |  |  |  |
Accrued interest |  | $ | 49 |  |  | $ | 618 |
Accrued losses on equipment contracts |  | 104 |  |  | 183 |
Taxes payable |  | 754 |  |  | 244 |
Dividends payable |  | 5,237 |  |  | — |
Deferred revenue |  | 45 |  |  | 76 |
Warranty liabilities |  | 601 |  |  | 287 |
Deferred rent |  | — |  |  | 369 |
Asset retirement obligation |  | 527 |  |  | 1,312 |
Other |  | 891 |  |  | 928 |
|  | $ | 8,208 |  |  | $ | 4,017 |
Other long-term liabilities: |  |  |  |
Deferred rent |  | 203 |  |  | 38 |
Deferred revenue, related party |  | 2,000 |  |  | 2,000 |
Dividends payable |  | 31 |  |  | — |
|  | $ | 2,234 |  |  | $ | 2,038 |
The tables below details additional components of Other current liabilities and Other long-term liabilities as presented above: The changes in the carrying amount of the Company’s warranty obligations from December 31, 2016 through June 30, 2017 are as follows:
|  | As of
(in thousands) |  | June 30, 2017
Balance, beginning of period |  | $ | 287 |
Warranties accrued, net |  | 580 |
Consumption of warranty obligations accrued |  | (291 | )
Change in estimate related to previous warranties accrued |  | 25 |
Balance, end of period |  | $ | 601 |
Included within Other current liabilities as of June 30, 2017 and Other long-term liabilities as of December 31, 2016 is the Company's asset retirement obligation. Changes in the Company's asset retirement obligations are as follows:
|  | As of
(in thousands) |  | June 30, 2017
Asset retirement obligation, beginning of period |  | $ | 1,312 |
Accretion |  | 33 |
Liabilities settled |  | (19 | )
Changes due to amount and timing of reclamation |  | (799 | )
Asset retirement obligations, end of period |  | $ | 527 |
The Company's estimate for its asset retirement obligation was reduced during the three and six months ended June 30, 2017 as the scope of the asset retirement obligation was reduced. The change in estimate was recorded within the Research and development, net line item of the Condensed Consolidated Statements of Operations as the asset retirement obligation related to a research project which expenses were originally recorded within the same line item. Supplemental Condensed Consolidated Statements of Operations Information The following table details the components of Interest expense in the Condensed Consolidated Statements of Operations:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands) |  | 2017 |  | 2016 |  | 2017 |  | 2016
453A interest |  | $ | 566 |  |  | $ | 354 |  |  | $ | 1,032 |  |  | $ | 1,145 |
Interest on RCM6 note payable, related party |  | — |  |  | — |  |  | — |  |  | 263 |
Credit agreement interest |  | 36 |  |  | 1,215 |  |  | 73 |  |  | 2,112 |
Other |  | 26 |  |  | 4 |  |  | 216 |  |  | 17 |
|  | $ | 628 |  |  | $ | 1,573 |  |  | $ | 1,321 |  |  | $ | 3,537 |
The following table details the components of the Other line item of the Condensed Consolidated Statements of Operations:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands) |  | 2017 |  | 2016 |  | 2017 |  | 2016
Gain on sale of equity method investment |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2,078 |
Gain on settlement of note payable and licensed technology |  | — |  |  | 151 |  |  | — |  |  | 1,019 |
Other |  | 7 |  |  | (430 | ) |  | 16 |  |  | (417 | )
|  | $ | 7 |  |  | $ | (279 | ) |  | $ | 16 |  |  | $ | 2,680 |

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