v3.19.3

Long-Term Debt - Additional Information - Convertible Notes (Details) - USD ($)	1 Months Ended	9 Months Ended
	Aug. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 29, 2018	Jun. 28, 2018	Apr. 02, 2018	Feb. 09, 2018
Debt Instrument [Line Items]
Outstanding convertible promissory notes and accrued interest converted, amount		$ 0	$ 14,898,326
Convertible notes outstanding		$ 0
Convertible Notes
Debt Instrument [Line Items]
Outstanding convertible promissory notes and accrued interest converted, amount	$ 14,900,000
Convertible Notes | Common Stock
Debt Instrument [Line Items]
Outstanding convertible promissory notes and accrued interest converted, shares	3,239,294
Note Purchase Agreement | Convertible Notes
Debt Instrument [Line Items]
Increase the principal amount available for issuance				$ 19,400,000	$ 18,400,000	$ 18,400,000
Note Purchase Agreement | Convertible Notes | Maximum
Debt Instrument [Line Items]
Original principal amount							$ 16,000,000

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- Definition

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+ References

No definition available.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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