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Balance Sheet Components (Tables) | 3 Months Ended
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Mar. 31, 2021
Balance Sheet Components |
Schedule of property and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ | Useful Life | 2021 |  | 2020
​ | ​ | (in thousands)
Machinery and equipment | 3-5 years | $ | 56,298 | ​ | $ | 51,001
Furniture and fixtures | 3 years | ​ | 1,376 | ​ |  | 1,376
Computer equipment | 3 years | ​ | 1,786 | ​ |  | 2,428
Capitalized software held for internal use | 3 years | ​ | 8,059 | ​ | ​ | 7,417
Leasehold improvements | Lesser of useful life or lease term | ​ | 14,854 | ​ |  | 14,810
Construction-in-process | ​ | ​ | 10,407 | ​ |  | 6,370
​ | ​ | ​ | 92,780 | ​ |  | 83,402
Less: Accumulated depreciation and amortization | ​ | ​ | (52,603) | ​ |  | (50,054)
Total Property and Equipment, net | ​ | $ | 40,177 | ​ | $ | 33,348
Schedule of accrued compensation | ​
​ | ​ | ​ | ​ | ​ | ​
​ | March 31, |  | December 31,
​ | 2021 |  | 2020
​ | (in thousands)
Accrued paid time off | $ | 2,373 | ​ | $ | 2,260
Accrued commissions |  | 10,520 | ​ |  | 12,686
Accrued bonuses |  | 3,709 | ​ |  | 9,635
Other accrued compensation |  | 9,268 | ​ |  | 5,790
Total accrued compensation | $ | 25,870 | ​ | $ | 30,371
Schedule of other accrued liabilities | ​
​ | ​ | ​ | ​ | ​ | ​
​ | March 31, |  | December 31,
​ | 2021 |  | 2020
​ | (in thousands)
Reserves for refunds to insurance carriers | $ | 20,304 | ​ | $ | 17,366
Accrued charges for third-party testing | ​ | 5,180 | ​ | ​ | 5,141
Testing and laboratory materials from suppliers | ​ | 9,247 | ​ | ​ | 2,720
Marketing and corporate affairs | ​ | 4,815 | ​ | ​ | 3,325
Legal, audit and consulting fees |  | 8,601 | ​ |  | 4,189
Accrued shipping charges | ​ | 2,475 | ​ | ​ | 1,604
Sales tax payable | ​ | 1,151 | ​ | ​ | 1,723
Accrued specimen service fees | ​ | 4,701 | ​ | ​ | 2,355
Clinical trials and studies | ​ | 1,940 | ​ | ​ | 2,353
Operating lease liabilities, current portion | ​ | 6,049 | ​ | ​ | 7,300
Fixed asset purchases | ​ | 1,803 | ​ | ​ | 1,691
Other accrued interest | ​ | 2,695 | ​ | ​ | 1,078
Deposits held for sublease | ​ | 320 | ​ | ​ | —
Other accrued expenses |  | 8,015 | ​ | ​ | 9,562
Total other accrued liabilities | $ | 77,296 | ​ | $ | 60,407
Summary of reserve balance and activities for refunds to insurance carriers | ​
​ | ​ | ​ | ​ | ​ | ​
​ | March 31, |  | March 31,
​ | 2021 |  | 2020
​ | (in thousands)
Beginning balance | $ | 17,366 | ​ | ​ | 9,410
Additional reserves |  | 5,594 | ​ |  | 4,684
Refunds to carriers |  | (1,403) | ​ | ​ | (1,468)
Reserves released to revenue | ​ | (1,253) | ​ | ​ | (1,027)
Ending balance | $ | 20,304 | ​ | $ | 11,599
​ | ​ | ​ | ​ | ​ | ​

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