Description of Business and Summary of Significant Accounting Policies (Concentration of Credit Risk) (Details) - Customer Concentration Risk - customer	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Sales [Member]
Concentration Risk [Line Items]
Number of customers over 10% or Sales and AR	2	3
Sales [Member] | Beijing Etechwin [Member]
Concentration Risk [Line Items]
Major customer, percentage of sales	12.00%	11.00%
Sales [Member] | Continental Automotive [Member]
Concentration Risk [Line Items]
Major customer, percentage of sales	11.00%	15.00%
Sales [Member] | CRRC-SRI [Member]
Concentration Risk [Line Items]
Major customer, percentage of sales		10.00%
Accounts Receivable
Concentration Risk [Line Items]
Number of customers over 10% or Sales and AR	2	2
Accounts Receivable | Continental Automotive [Member]
Concentration Risk [Line Items]
Major customer, percentage of sales		15.00%
Accounts Receivable | CRRC-SRI [Member]
Concentration Risk [Line Items]
Major customer, percentage of sales	12.00%	11.00%
Accounts Receivable | Wuxi Chirun Technology [Member]
Concentration Risk [Line Items]
Major customer, percentage of sales	10.00%