Investments Investments Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Investments [Abstract]
Treasury bill interest rate range, minimum	2.20%
Treasury bill interest rate range, maximum	2.40%
Proceeds from purchase of short-term investments	$ 0	$ 74,768

Proceeds from (payments for) debt securities held-to-maturity

No definition available.

Name:	acrg_Proceedsfrompaymentsfordebtsecuritiesheldtomaturity
Namespace Prefix:	acrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration