Note 13 - Common Dividends, Dividend Equivalents and Distributions (Details Textual) - USD ($)	Mar. 31, 2022	Mar. 31, 2021
Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Unearned Dividend Equivalents	$ 26,854	$ 0
Performance Stock Units (PSU) [Member]
Share-based Payment Arrangement, Unearned Dividend Equivalents	$ 49,755	$ 0

The amount of unearned dividend equivalents under share based compensation arrangement.

No definition available.

Name:	nlcp_SharebasedPaymentArrangementUnearnedDividendEquivalents
Namespace Prefix:	nlcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant