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Commitments (Details 2) - 2015 Omnibus Incentive Plan [Member] - $ / shares	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning	6,506,917	5,092,030
Granted	855,399	1,730,000
Forfeited	(163,550)	(164,280)
Exercised		(150,833)
Outstanding at ending	7,198,766	6,506,917
Exercisable at ending	4,359,159
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning	$ 3.83	$ 4.13
Granted	2.58	2.71
Forfeited	2.55	3.66
Exercised		1.18
Outstanding at ending	3.71	3.83
Exercisable at ending	3.84
Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Grant Date Fair Value [Roll Forward]
Granted	$ 2.07	$ 2.09

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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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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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

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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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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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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