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Fair Value Measurements (Tables) | 6 Months Ended
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Sep. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis | As of September 30, 2018 and March 31, 2018, the Company’s financial assets and financial liabilities are presented below at fair value and were classified within the fair value hierarchy as follows:
|  | Level 1 |  | Level 2 |  | Level 3 |  | Balance as of September 30, 2018
|  |  |  |  |  |  |  | (Unaudited)
Financial Liabilities |  |  |  |  |  |  |  |
Convertible note embedded derivative liability |  | $ | — |  |  | $ | — |  |  | $ | 1,728 |  |  | $ | 1,728 |
Warrant liability |  | — |  |  | — |  |  | 1,484 |  |  | 1,484 |
Total |  | $ | — |  |  | $ | — |  |  | $ | 3,212 |  |  | $ | 3,212 |
|  | Level 1 |  | Level 2 |  | Level 3 |  | Balance as of March 31, 2018
Financial Liabilities |  |  |  |  |  |  |  |
Convertible note embedded derivative liability |  | $ | — |  |  | $ | — |  |  | $ | 4,676 |  |  | $ | 4,676 |
Warrant liability |  | — |  |  | — |  |  | 3,980 |  |  | 3,980 |
Total |  | $ | — |  |  | $ | — |  |  | $ | 8,656 |  |  | $ | 8,656 |
The Company’s financial liabilities as of the issuance date of the convertible notes on the initial measurement date of September 28, 2016 are presented below at fair value and were classified within the fair value hierarchy as follows:
|  | Level 1 |  | Level 2 |  | Level 3 |  | Balance at Inception
Financial Liabilities |  |  |  |  |  |  |  |
Convertible note embedded derivative liability |  | $ | — |  |  | $ | — |  |  | $ | 3,693 |  |  | $ | 3,693 |
Warrant liability |  | — |  |  | — |  |  | 1,223 |  |  | 1,223 |
Total |  | $ | — |  |  | $ | — |  |  | $ | 4,916 |  |  | $ | 4,916 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation | The following table provides a reconciliation of the beginning and ending balances for the convertible note embedded derivative liability measured at fair value using significant unobservable inputs (Level 3):
|  | Level 3
Balance at March 31, 2018 |  | $ | 4,676 |
Change in fair value of convertible note embedded derivative liability |  | (2,572 | )
Derecognition on extinguishment or conversion |  | (376 | )
Balance at September 30, 2018 |  | $ | 1,728 |
The following table provides a reconciliation of the beginning and ending balances for the warrant liability measured at fair value using significant unobservable inputs (Level 3):
|  | Level 3
Balance at March 31, 2018 |  | $ | 3,980 |
Change in fair value of warrant liability |  | (2,496 | )
Balance at September 30, 2018 |  | $ | 1,484 |
Fair Value Inputs, Liabilities, Quantitative Information | The market-based assumptions and estimates used in valuing the convertible note embedded derivative liability include the following amounts:
| September 30, 2018
Stock price volatility | 60 | %
Probability of change in control | 1.75 | %
Stock price (per share) | $1.24
Expected term | 2.00 years |
Risk-free rate (1) | 2.77 | %
Assumed early conversion/exercise price (per share) | $2.73
(1) The Monte Carlo simulation assumes the continuously compounded equivalent (CCE) interest rate of 1.0% based on the average of the 2-year and 3-year U.S. Treasury securities as of the valuation date. The market-based assumptions and estimates used in valuing the warrant liability include amounts in the following amounts:
| September 30, 2018
Stock price volatility | 60 | %
Probability of change in control | 1.75 | %
Stock price (per share) | $1.24
Expected term | 2.00 years |
Risk-free rate (1) | 2.77 | %
Assumed early conversion/exercise price (per share) | $2.73
(1) The Monte Carlo simulation assumes the continuously compounded equivalent (CCE) interest rate of 1.0% based on the average of the 2-year and 3-year U.S. Treasury securities as of the valuation date. The assumptions utilized in this model for options granted during the six months ended September 30, 2018 are presented below.
|  | September 30, 2018
Risk-free interest rate |  | 2.79% to 3.04%
Expected life of the options |  | 5.62 to 9.69 years
Expected volatility |  | 66%
Expected dividend yield |  | —%
Expected forfeitures |  | 29%

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of liabilities measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 + Details
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