Lease Commitments - Supplemental balance sheet information related to leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Operating leases	$ 754	$ 1,044
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, equipment, and software development, net	Property, equipment, and software development, net
Finance leases	$ 97	$ 104
Total leased assets	851	1,148
Liabilities:
Operating leases, current portion of lease liabilities	263	474
Finance leases, current portion of lease liabilities	49	50
Current portion of lease liabilities	312	524
Operating leases, Lease liabilities, net of current portion	491	567
Finance leases, Lease liabilities, net of current portion	21	34
Lease liabilities, net of current portion	512	601
Total lease liabilities	$ 824	$ 1,125
Weighted average remaining lease term (in years):
Operating leases	3 years 4 months 24 days	2 years 10 months 24 days
Finance leases	1 year 4 months 24 days	1 year 8 months 12 days
Weighted average discount rate:
Operating leases	4.57%	5.59%
Finance leases	5.00%	5.00%
Operating leases, accumulated amortization	$ 800	$ 1,600
Finance leases, accumulated amortization	$ 45	$ 38
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	teum:FinanceAndOperatingLeaseCurrent	teum:FinanceAndOperatingLeaseCurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	teum:FinanceAndOperatingLeaseCurrent	teum:FinanceAndOperatingLeaseCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	teum:FinanceAndOperatingLeaseNonCurrent	teum:FinanceAndOperatingLeaseNonCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	teum:FinanceAndOperatingLeaseNonCurrent	teum:FinanceAndOperatingLeaseNonCurrent