Note 8 - Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 04, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Common stock, shares authorized	50,000,000	50,000,000		50,000,000
Awards outstanding	70,000	70,000
Restricted Stock Awards [Member]
Class Of Stock [Line Items]
Stock-based award activity	213,545	213,545		153,200
Shares surrendered to satisfy tax obligations		7,136
Compensation expense related to these share-based payments	$ 0.1	$ 0.1
Unrecognized costs from stock-based awards	$ 0.2	$ 0.2
Unrecognized compensation cost recognition period		8 months 12 days
2020 Equity Incentive Plan [Member]
Class Of Stock [Line Items]
Common stock shares available for issuance	3,620,000	3,620,000
Common stock, shares authorized	3,376,283	3,376,283
2020 Equity Incentive Plan [Member] | Restricted Stock Awards [Member]
Class Of Stock [Line Items]
Stock-based award activity	0	0
Operating Partnership [Member]
Class Of Stock [Line Items]
Operating partnership percentage		91.10%
Percentage of collectively owned in operating partnership by investors		8.90%
Operating partnership units redeemed		0
Lamont Street [Member]
Class Of Stock [Line Items]
Warrants to purchase of common stock			200,000
Warrants to purchase of common stock, Exercise price			$ 2.50