Disposal group including discontinued operation commissions paid.

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- Definition

Investment in publicly traded company.

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No definition available.

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- Definition

Proceeds from shares received in cash merger consideration.

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No definition available.

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- Definition

Sale of stock number of investment owned shares issued in transaction.

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No definition available.

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- Definition

Sale price per share of equity method investment.

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No definition available.

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- Definition

Shares price per share received in cash merger consideration.

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No definition available.

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- Definition

Percent, after disposal, of ownership interest of a discontinued operation in which an equity method investment is retained.

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- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount of realized and unrealized gain (loss) on investment.

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- Definition

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.

+ References

No definition available.

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- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

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- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

+ References

No definition available.

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Sale of Investment in ASV Holdings - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended		3 Months Ended		9 Months Ended
	Feb. 28, 2018	May 17, 2017	Sep. 30, 2019	Feb. 28, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Equity Method Investment, Realized Pretax Gain (Loss) on Disposal								$ (87)
Gain (loss) from change in fair value of marketable securities					$ 216	$ (907)	$ 5,454	$ (2,308)
ASV after transaction [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of shares sold	1,000,000
Percentage of reduction in investment	11.00%
Number of shares remaining for merger cash consideration			1,080,000
Sale of Partial Interest in ASV Holdings [Member] \| ASV after transaction [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Percentage of ownership interest after disposal		21.20%
Sale of Partial Interest in ASV Holdings [Member] \| Initial Public Offering [Member] \| ASV as a legal entity [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of shares sold		3,800,000
Sale of Partial Interest in ASV Holdings [Member] \| Initial Public Offering [Member] \| ASV after transaction [Member] \| Manitex International, Inc. [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of shares sold		2,000,000
Disposition of the Remaining Available for Sale Investment [Member] \| ASV as a legal entity [Member] \| Yanmar America Corporation [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of shares remaining for merger cash consideration			1,080,000
Shares price per share received in cash merger consideration			$ 7.05
Proceeds from shares received in cash merger consideration			$ 7,600
Disposition of the Remaining Available for Sale Investment [Member] \| ASV after transaction [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of shares sold				1,000,000
Sale price per share of equity method investment				$ 7.00
Number of common stock outstanding, owned by Company	1,080,000			1,080,000
Percentage of reduction in investment				11.00%
Equity Method Investment, Realized Pretax Gain (Loss) on Disposal				$ (205)
Discontinued operation, commissions paid				$ 118