Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Maximum number of Redeemable Units sold by the Partnership | shares	0
Maximum [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage of partnership assets allocated	10.00%
Minimum [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Net asset value per unit liquidation circumstance | $ / shares	$ 400
Aggregate net assets of partnership liquidation threshold circumstance | $	$ 1,000,000
Partnership liquidation date circumstance	Dec. 31, 2019