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S. SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |
SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) | NOTE S—Selected Quarterly Financial Data (unaudited) The following tables set forth a summary of the Company’s quarterly financial information for each of the four quarters for the years ended December 31, 2016 and 2015.
|  | First |  | Second |  | Third |  | Fourth |
Year ended December 31, 2016 |  | Quarter |  | Quarter |  | Quarter |  | Quarter |
Revenue |  | $ | 50,422 |  | $ | 55,254 |  | $ | 70,137 |  | $ | 84,900 |
Cost of goods sold |  |  | 36,169 |  |  | 37,952 |  |  | 46,976 |  |  | 52,662 |
Gross profit |  | $ | 14,253 |  | $ | 17,302 |  | $ | 23,161 |  | $ | 32,238 |
Gross margin |  |  | 28.3% |  |  | 31.3% |  |  | 33.0% |  |  | 38.0% |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  | $ | 8,396 |  | $ | 7,814 |  | $ | 8,362 |  | $ | 7,208 |
Sales and marketing |  |  | 1,680 |  |  | 1,610 |  |  | 1,594 |  |  | 1,743 |
General and administrative |  |  | 5,733 |  |  | 5,906 |  |  | 6,445 |  |  | 7,443 |
Total operating expenses |  | $ | 15,809 |  | $ | 15,330 |  | $ | 16,401 |  | $ | 16,394 |
Income (loss) from operations |  | $ | (1,556) |  | $ | 1,972 |  | $ | 6,760 |  | $ | 15,844 |
Interest and other income (expense), net |  |  | 34 |  |  | (1,317) |  |  | (356) |  |  | (378) |
Net income (loss) before taxes |  | $ | (1,522) |  | $ | 655 |  | $ | 6,404 |  | $ | 15,466 |
Income tax (expense) benefit |  |  | 192 |  |  | (52) |  |  | 11,332 |  |  | (1,241) |
Net income (loss) |  | $ | (1,330) |  | $ | 603 |  | $ | 17,736 |  | $ | 14,225 |
Net income (loss) per share—basic |  |  | (0.08) |  |  | 0.04 |  |  | 1.03 |  |  | 0.81 |
Net income (loss) per share—diluted |  |  | (0.08) |  |  | 0.03 |  |  | 0.97 |  |  | 0.77 |
|  | First |  | Second |  | Third |  | Fourth |
Year ended December 31, 2015 |  | Quarter |  | Quarter |  | Quarter |  | Quarter |
Revenue |  | $ | 30,234 |  | $ | 49,632 |  | $ | 57,085 |  | $ | 52,952 |
Cost of goods sold |  |  | 20,183 |  |  | 32,901 |  |  | 39,032 |  |  | 37,334 |
Gross profit |  | $ | 10,051 |  | $ | 16,731 |  | $ | 18,053 |  | $ | 15,618 |
Gross margin |  |  | 33.2% |  |  | 33.7% |  |  | 31.6% |  |  | 29.5% |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  | $ | 4,805 |  | $ | 4,701 |  | $ | 5,386 |  | $ | 5,960 |
Sales and marketing |  |  | 1,559 |  |  | 1,607 |  |  | 1,582 |  |  | 1,633 |
General and administrative |  |  | 5,003 |  |  | 4,534 |  |  | 4,963 |  |  | 5,271 |
Total operating expenses |  | $ | 11,367 |  | $ | 10,842 |  | $ | 11,931 |  | $ | 12,864 |
Income (loss) from operations |  | $ | (1,316) |  | $ | 5,889 |  | $ | 6,122 |  | $ | 2,754 |
Interest and other income (expense), net |  |  | 641 |  |  | 335 |  |  | (3,016) |  |  | (241) |
Net income (loss) before taxes |  | $ | (675) |  | $ | 6,224 |  | $ | 3,106 |  | $ | 2,513 |
Income tax (expense) benefit |  |  | — |  |  | (135) |  |  | (406) |  |  | 166 |
Net income (loss) |  | $ | (675) |  | $ | 6,089 |  | $ | 2,700 |  | $ | 2,679 |
Net income (loss) per share—basic |  | $ | (0.05) |  |  | 0.41 |  |  | 0.17 |  |  | 0.16 |
Net income (loss) per share—diluted |  | $ | (0.05) |  |  | 0.38 |  |  | 0.16 |  |  | 0.15 |

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68076893&loc=d3e1570-108306 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 + Details
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