|
Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Cash flows from operating activities: |
|
|
|
| Net loss |
$ (8,819) |
$ (756) |
$ (30,015) |
| Adjustments to reconcile net loss to net cash provided by operating activities: |
|
|
|
| Depreciation and amortization |
9,396 |
7,995 |
7,079 |
| Stock-based compensation |
5,483 |
3,652 |
2,442 |
| Revaluation of preferred stock warrant liability |
0 |
0 |
(554) |
| Unrealized Gain (Loss) on Derivatives |
0 |
0 |
24,476 |
| Issuance of Stock and Warrants for Services or Claims |
0 |
0 |
312 |
| Impairment of long-lived assets |
0 |
949 |
0 |
| Loss on disposal of property and equipment |
9 |
2 |
65 |
| Changes in operating assets and liabilities: |
|
|
|
| Prepaid expenses and other assets |
(958) |
371 |
(2,677) |
| Inventory |
(1,326) |
(1,459) |
(343) |
| Accounts receivable |
1,308 |
2,788 |
(7,030) |
| Accounts payable |
747 |
(177) |
(203) |
| Accrued and other liabilities |
1,767 |
(369) |
5,446 |
| Deferred revenue |
616 |
726 |
(5,128) |
| Related party deferred revenue |
(444) |
(10,236) |
(3,134) |
| Net cash provided by (used in) operating activities |
7,779 |
3,486 |
(8,156) |
| Cash flows from investing activities: |
|
|
|
| Purchase of short-term investments |
(1,001) |
(2,201) |
(750) |
| Redemption of short-term investments |
1,001 |
2,201 |
750 |
| Purchase of property and equipment |
(13,534) |
(6,560) |
(12,806) |
| Purchased and capitalized intangible assets |
(1,585) |
(1,274) |
(835) |
| Decrease in restricted cash |
0 |
0 |
173 |
| Net cash used in investing activities |
(15,119) |
(7,834) |
(13,468) |
| Cash flows from financing activities: |
|
|
|
| Proceeds from debt |
25,000 |
0 |
0 |
| Payment of debt |
(26,514) |
(804) |
0 |
| Payment of selling stockholder offering costs |
0 |
0 |
(1,389) |
| Proceeds from exercise of common stock options |
2,654 |
2,433 |
476 |
| Proceeds from exercise of common stock warrants |
0 |
0 |
6,376 |
| Proceeds from initial public offering, net of expenses |
0 |
0 |
49,217 |
| Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs |
0 |
0 |
24,882 |
| Net cash provided by financing activities |
1,140 |
1,629 |
79,562 |
| Net (decrease) increase in cash and cash equivalents |
(6,200) |
(2,719) |
57,938 |
| Cash and cash equivalents at beginning of period |
78,283 |
81,002 |
23,064 |
| Cash and cash equivalents at end of period |
72,083 |
78,283 |
81,002 |
| Supplemental disclosure of cash flow information: |
|
|
|
| Cash paid for interest |
790 |
1,196 |
0 |
| Cash paid for income taxes, net of refunds received |
8 |
45 |
20 |
| Noncash investing activities: |
|
|
|
| Accretion on redeemable convertible preferred stock |
0 |
0 |
8,660 |
| Contract intangible obtained under a derivative liability |
0 |
0 |
2,842 |
| Issuance of debt in connection with derivative liability |
0 |
0 |
27,318 |
| Transfer of property and equipment to inventory |
$ 393 |
$ 0 |
$ 0 |