Stockholders' Equity - Stock Options and a Summary of Activity (Details) - $ / shares	6 Months Ended	9 Months Ended
Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Stockholders' Equity Note [Abstract]
Fair value of options issued (in dollars per share)		$ 0.32	$ 1.41
Exercise price (in dollars per share)		$ 0.42	$ 1.97
Expected life of options (in years)	0 years	6 years 3 months 30 days	5 years 10 months 18 days
Risk-free interest rate		1.90%	2.60%
Expected volatility		90.00%	84.20%
Dividend yield		0.00%	0.00%
Number of Options
Outstanding at beginning of period (in shares)	292,871	292,871
Granted (in shares)		450,000
Canceled/forfeited (in shares)		(151,993)
Outstanding at end of period (in shares)		563,353
Vested and expected to vest at period end (in shares)		420,864
Exercisable at period end (in shares)		109,837
Weighted Average Exercise Price Per Share
Outstanding at beginning of period (in dollars per share)	$ 3.78	$ 3.78
Granted (in dollars per share)		0.42
Canceled/forfeited (in dollars per share)		2.90
Outstanding at end of period (in dollars per share)		1.26
Vested and expected to vest at period end (in dollars per share)		1.54
Exercisable at period end (in dollars per share)		$ 4.63
Weighted Average Remaining Contractual Life (in years)
Outstanding at end of period		9 years 1 month
Vested and expected to vest at period end		8 years 10 months 31 days
Exercisable at period end		6 years 3 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period		27,525
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price		$ 5.33

Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Price of a single share of a number of saleable stocks of a company.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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