Note 1 - General (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Restrictions on Cash and Cash Equivalents [Table Text Block]

	December 31, 2021		December 31, 2020
	(In thousands)
Cash and cash equivalents	$	24,739	$	15,601
Restricted cash		25		—
Total cash, cash equivalents and restricted cash	$	24,764	$	15,601

Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block]

	Operating lease payments			Expected sublease receipts
	(In thousands)
2022	$	601		$	540
2023		607			556
2024		613			573
2025		619			590
2026		207			199
2027		—			—
Thereafter		—			—
Total future minimum lease payments		2,647			2,458
Less imputed interest		(595	)
Total operating lease liabilities	$	2,052