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Unaudited Selected Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2018
Unaudited Selected Quarterly Financial Data [Abstract] |
Schedule of Unaudited Quarterly Financial Data |
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﻿ | Fiscal 2018 Quarter Ended
﻿(in thousands, except per share data) | March 31, |  | June 30, |  | September 30, |  | December 31, |
﻿Total revenue | $ | 19,362 |  | $ | 21,578 |  | $ | 18,160 |  | $ | 19,526 |
﻿Total gross profit |  | 7,296 |  |  | 8,862 |  |  | 3,192 |  |  | 5,746 |
﻿Total operating expenses |  | 31,245 |  |  | 30,607 |  |  | 27,862 |  |  | 36,369 |
﻿Loss from operations |  | (23,949) |  |  | (21,745) |  |  | (24,670) |  |  | (30,623) |
﻿Net loss |  | (24,179) |  |  | (22,540) |  |  | (25,044) |  |  | (30,799) |
﻿Basic and diluted net loss per share | $ | (0.20) |  | $ | (0.17) |  | $ | (0.19) |  | $ | (0.21) |
﻿Weighted average shares used in computing net loss per share |  | 123,768 |  |  | 131,882 |  |  | 135,130 |  |  | 149,314 |
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﻿ | Fiscal 2017 Quarter Ended
﻿(in thousands, except per share data) | March 31, |  | June 30, |  | September 30, |  | December 31, |
﻿Total revenue | $ | 24,915 |  | $ | 20,073 |  | $ | 23,545 |  | $ | 24,935 |
﻿Total gross profit |  | 8,937 |  |  | 8,001 |  |  | 8,227 |  |  | 9,494 |
﻿Total operating expenses |  | 32,236 |  |  | 32,388 |  |  | 29,796 |  |  | 30,023 |
﻿Loss from operations |  | (23,299) |  |  | (24,387) |  |  | (21,569) |  |  | (20,529) |
﻿Net loss |  | (23,867) |  |  | (25,539) |  |  | (22,021) |  |  | (20,762) |
﻿Basic and diluted net loss per share | $ | (0.26) |  | $ | (0.26) |  | $ | (0.19) |  | $ | (0.18) |
﻿Weighted average shares used in computing net loss per share |  | 92,970 |  |  | 97,360 |  |  | 115,771 |  |  | 116,259 |
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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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