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Supplemental Financial Information | 12 Months Ended
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Dec. 31, 2016
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 assets as presented in the Consolidated Balance Sheets:
|  | As of December 31,
(in thousands) |  | 2016 |  | 2015
Other current assets: |  |  |  |
Prepaid expenses |  | $ | 1,169 |  |  | $ | 2,117 |
Inventory |  | 16 |  |  | 189 |
Other |  | 172 |  |  | — |
|  | $ | 1,357 |  |  | $ | 2,306 |
Other long-term assets: |  |  |  |
Deposits |  | $ | 263 |  |  | $ | 414 |
Intangibles |  | 696 |  |  | 1,941 |
Other long-term assets |  | 323 |  |  | 341 |
|  | $ | 1,282 |  |  | $ | 2,696 |
The following table details the components of Other current liabilities and Other long-term liabilities as presented in the Consolidated Balance Sheets:
|  | As of December 31,
(in thousands) |  | 2016 |  | 2015
Other current liabilities: |  |  |  |
Accrued consultant incentives |  | $ | — |  |  | $ | 369 |
Accrued interest |  | 618 |  |  | 1,042 |
Accrued losses on equipment contracts |  | 183 |  |  | 759 |
Taxes payable |  | 244 |  |  | 521 |
Deferred revenue |  | 76 |  |  | 682 |
Warranty liabilities |  | 287 |  |  | 1,197 |
Deferred rent |  | 369 |  |  | — |
Asset retirement obligation |  | 1,312 |  |  | 1,248 |
Other |  | 928 |  |  | 1,577 |
|  | $ | 4,017 |  |  | $ | 7,395 |
Other long-term liabilities: |  |  |  |
Deferred rent |  | $ | 38 |  |  | $ | 767 |
Advance deposit, related party |  | — |  |  | 2,981 |
Deferred revenue, related party |  | 2,000 |  |  | 2,000 |
Other long-term liabilities |  | — |  |  | 2,604 |
|  | $ | 2,038 |  |  | $ | 8,352 |
The tables below detail components of Other current liabilities as presented above: The changes in the carrying amount of the Company’s warranty obligations, which do not include amounts for DSI systems, as revenues are deferred until the end of the warranty period, were as follows:
|  | As of December 31,
(in thousands) |  | 2016 |  | 2015
Balance, beginning of year |  | $ | 1,197 |  |  | $ | 152 |
Warranties accrued, net |  | 89 |  |  | 1,337 |
Warranty claims |  | (899 | ) |  | (292 | )
Change in estimate related to previous warranties accrued |  | (100 | ) |  | — |
Balance, end of year |  | $ | 287 |  |  | $ | 1,197 |
Included within Other current liabilities is the Company's asset retirement obligation. Changes in the Company's asset retirement obligations were as follows:
|  | As of December 31,
(in thousands) |  | 2016 |  | 2015
Asset retirement obligation, beginning of year |  | $ | 1,248 |  |  | $ | 1,188 |
Accretion |  | 64 |  |  | 60 |
Asset retirement obligations, end of year |  | $ | 1,312 |  |  | $ | 1,248 |
Supplemental Consolidated Statements of Operations Information The following table details the components of Interest expense in the Consolidated Statements of Operations:
|  | Years Ended December 31,
(in thousands) |  | 2016 |  | 2015 |  | 2014
453A interest |  | $ | 2,490 |  |  | $ | 4,639 |  |  | $ | 3,371 |
Interest on RCM6 note payable, related party |  | 263 |  |  | 2,468 |  |  | 2,245 |
Credit agreement interest |  | 1,884 |  |  | 1,180 |  |  | — |
Other |  | 429 |  |  | 115 |  |  | 109 |
|  | $ | 5,066 |  |  | $ | 8,402 |  |  | $ | 5,725 |
The following table details the components of Other in the Consolidated Statements of Operations:
|  | Years Ended December 31,
(in thousands) |  | 2016 |  | 2015 |  | 2014
Gain on sale of equity method investment |  | $ | 2,078 |  |  | $ | — |  |  | $ | — |
Gain on settlement of note payable and licensed technology |  | 1,019 |  |  | — |  |  | — |
Impairment of cost method investment |  | (1,760 | ) |  | — |  |  | — |
Gain on termination of sales-type lease |  | 891 |  |  | — |  |  | — |
Other |  | 235 |  |  | 494 |  |  | 26 |
|  | 2,463 |  |  | 494 |  |  | 26 |

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