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Share-Based Payment Awards - Deferred Stock Units - Additional Information (Detail) - Deferred Stock Units [Member] - $ / shares		6 Months Ended
	Jun. 21, 2018	Dec. 31, 2018	Sep. 30, 2018
Class of Stock [Line Items]
Weighted average remaining vesting term		5 months 18 days
Non Executive Directors [Member]
Class of Stock [Line Items]
Granted	35,001
Grand Date Fair Value	$ 1.95		$ 2.32
Cliff vesting period	1 year

X

- Definition

Share based compensation arrangement by share based payment award equity instruments other than options cliff vesting period.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options vested weighted average remaining contractual term.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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

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