Cash and Investments Held in Trust Account (Details Textual) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
United States Money Market Funds [Member]
Cash and Investments Held in Trust Account (Textual)
Investment in company's trust account	$ 120,728,495	$ 1,187,964
U.S. Treasury Securities [Member]
Cash and Investments Held in Trust Account (Textual)
Investment in company's trust account		$ 117,857,363

The amount of investment in the Company’s Trust Account.

No definition available.

Name:	ALAC_InvestmentInCompanysTrustAccount
Namespace Prefix:	ALAC_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant