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Consolidated Balance Sheets and Statements of Operations and Comprehensive Loss Components (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Balance Sheet Detail |  |
Schedule of inventory prepaid expenses and other current assets and property and equipment |  |
|  | December 31, |
|  | 2016 |  | 2015 |
|  | (in thousands) |
Inventories: |  |  |  |  |  |  |
Work-in-process |  | $ | 1,270 |  | $ | 1,478 |
Finished goods |  |  | 181 |  |  | 119 |
|  | $ | 1,451 |  | $ | 1,597 |
Prepaid expenses and other: |  |  |  |  |  |  |
Prepaid software |  | $ | 250 |  | $ | 287 |
Prepaid insurance |  |  | 116 |  |  | 134 |
Interest receivable |  |  | 17 |  |  | 48 |
Prepaid expenses and other |  |  | 90 |  |  | 232 |
|  | $ | 473 |  | $ | 701 |
Property and equipment, net: |  |  |  |  |  |  |
Equipment, furniture and fixtures and leasehold improvements |  | $ | 5,906 |  | $ | 5,646 |
Acquired software |  |  | 304 |  |  | 334 |
|  |  | 6,210 |  |  | 5,980 |
Less: Accumulated depreciation and amortization |  |  | (4,936) |  |  | (4,350) |
|  | $ | 1,274 |  | $ | 1,630 |
Schedule of identifiable intangible assets | Identifiable intangible assets were (dollar amounts in thousands):
|  | September 30, 2017 |
|  |  |  | Gross |  |  |  |  | Net |
|  | Life |  | Carrying |  | Accumulated |  | Carrying |
|  | (years) |  | Amount |  | Amortization |  | Amount |
Patent license |  | 7 |  |  | $ 780 |  |  | $ 641 |  |  | $ 139 |
|  | December 31, 2016 |
|  |  |  | Gross |  |  |  |  | Net |
|  | Life |  | Carrying |  | Accumulated |  | Carrying |
|  | (years) |  | Amount |  | Amortization |  | Amount |
Patent license |  | 7 |  |  | $ 780 |  |  | $ 557 |  |  | $ 223 |
| Identifiable intangible assets were (dollar amounts in thousands):
|  | December 31, 2016 |
|  |  |  | Gross |  |  |  |  | Net |
|  | Life |  | Carrying |  | Accumulated |  | Carrying |
|  | (years) |  | Amount |  | Amortization |  | Amount |
Patent license |  | 7 |  |  | $ 780 |  |  | $ 557 |  |  | $ 223 |
|  | December 31, 2015 |
|  |  |  | Gross |  |  |  |  | Net |
|  | Life |  | Carrying |  | Accumulated |  | Carrying |
|  | (years) |  | Amount |  | Amortization |  | Amount |
Patent license |  | 7 |  |  | $ 780 |  |  | $ 446 |  |  | $ 334 |
Schedule of accrued expenses and other |  |
|  | December 31, |
|  | 2016 |  | 2015 |
|  | (in thousands) |
Accrued wages and employee benefits |  | $ | 1,051 |  | $ | 1,076 |
IC development and wafer costs |  |  | 598 |  |  | 921 |
Interest payable |  |  | 314 |  |  | — |
Professional fees and consulting |  |  | 282 |  |  | 158 |
Deferred revenue |  |  | 271 |  |  | 31 |
Employee stock purchase plan withholdings |  |  | 200 |  |  | 323 |
Capital lease obligation |  |  | — |  |  | 138 |
Other |  |  | 57 |  |  | 17 |
|  | $ | 2,773 |  | $ | 2,664 |

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