Note 8 - Segment Information - Reportable Segments (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenues - External Customers	$ 29,624,344	$ 28,225,381
Healthcare Services Expense	22,796,626	21,498,804
Total	6,827,000	6,726,000
Investment income	90,206	78,057
Realized gains on investments, net	145,398	13,049
Insurance expense	6,548,208	6,019,432
Income before income tax	515,114	798,251
Total assets-corporate	109,287,842	93,213,000	$ 66,785,493
Fully Insured Dental HMO [Member]
Revenues - External Customers	11,788,000	12,609,000
Healthcare Services Expense	9,312,000	9,815,000
Total	2,476,000	2,794,000
Fully Insured Dental PPO [Member]
Revenues - External Customers	8,632,000	7,409,000
Healthcare Services Expense	5,872,000	4,894,000
Total	2,760,000	2,515,000
Self-insured Dental [Member]
Revenues - External Customers	8,886,000	7,885,000
Healthcare Services Expense	7,613,000	6,790,000
Total	1,273,000	1,095,000
Corporate and Other [Member]
Revenues - External Customers	318,000	322,000
Healthcare Services Expense
Total	$ 318,000	$ 322,000