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Cash, Cash Equivalents and Short-Term Investments - Summary of Short-term Investments with Unrealized Losses (Details) | 3 Months Ended
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Mar. 31, 2018 USD ($)
Cash And Cash Equivalents And Short Term Investments [Line Items] |
Less Than 12 Months, Estimated Fair Value | $ 10,043,047
Less Than 12 Months, Unrealized Losses. | (21,043)
US Treasury Securities |
Cash And Cash Equivalents And Short Term Investments [Line Items] |
Less Than 12 Months, Estimated Fair Value | 2,487,004
Less Than 12 Months, Unrealized Losses. | (5,660)
Corporate Debt Securities |
Cash And Cash Equivalents And Short Term Investments [Line Items] |
Less Than 12 Months, Estimated Fair Value | 4,542,071
Less Than 12 Months, Unrealized Losses. | (9,610)
Asset-backed Securities |
Cash And Cash Equivalents And Short Term Investments [Line Items] |
Less Than 12 Months, Estimated Fair Value | 3,013,972
Less Than 12 Months, Unrealized Losses. | $ (5,773)

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- Definition Cash and cash equivalents and short-term investments. + References No definition available. + Details
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- Definition Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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