Note 4 - Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, $ in Thousands			1 Months Ended	6 Months Ended
	Mar. 26, 2024 USD ($)	Jan. 18, 2023 $ / shares shares	Mar. 31, 2024 CNY (¥)	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2023 USD ($)	Jan. 17, 2023 shares	Jan. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)
Retained Earnings (Accumulated Deficit)				$ (60,756)			$ (59,690)
Accounts Receivable, Allowance for Credit Loss				4,657	$ 3,715	$ 4,261	3,987	$ 4,070			$ 3,760
Financing Receivable, Allowance for Credit Loss				$ 1,512	1,187	1,580	$ 1,559	850			617
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.001		$ 0.001			$ 0.001
Common Stock, Shares Authorized (in shares) | shares		20,000,000		20,000,000			20,000,000		100,000,000
Stock Issued During Period, Fractional Shares, Reverse Stock Splits (in shares) | shares		0
Common Stock, Shares, Issued (in shares) | shares		7,174,506		7,204,506			7,204,506		35,827,677
Contract with Customer, Performance Obligation Satisfied in Previous Period				$ 0	$ 0
Operating Lease, Liability				$ 0
Beijing Yi En [Member]
Business Acquisition, Percentage of Voting Interests Acquired				51.00%
Business Combination, Consideration Transferred	$ 0		¥ 1
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		5
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings (Accumulated Deficit)										$ 190
Accounts Receivable, Allowance for Credit Loss						0	$ 0	0		40	36
Financing Receivable, Allowance for Credit Loss						$ 0	$ 0	$ 0		$ 150	$ 155