Annual Total Returns	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Thompson LargeCap Fund | Thompson LargeCap Fund
Prospectus [Line Items]
Annual Return [Percent]	16.86%	21.92%	(15.73%)	28.05%	15.50%	33.58%	(12.29%)	18.24%	17.95%	(8.09%)
Thompson MidCap Fund | Thompson MidCap Fund
Prospectus [Line Items]
Annual Return [Percent]	7.53%	16.84%	(14.74%)	29.61%	11.97%	33.45%	(21.78%)	17.07%	19.38%	(9.49%)
Thompson Bond Fund | Thompson Bond Fund
Prospectus [Line Items]
Annual Return [Percent]	11.53%	6.98%	(7.27%)	5.75%	(1.72%)	5.56%	1.80%	4.75%	10.42%	(2.86%)