Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital in Excess of Par	Retained Earnings
Beginning Balance, Value at Dec. 31, 2016	$ 16,242	$ 1,175	$ 6,178	$ 8,889
Beginning Balance, Shares at Dec. 31, 2016	11,750	11,750
Stock-based compensation, Value	$ 242		242
Stock options exercised, Value	35	$ 14	21
Stock options exercised, Shares		136
Net income	4,662			4,662
Ending Balance, Value at Dec. 31, 2017	$ 21,181	$ 1,189	6,441	13,551
Ending Balance, Shares at Dec. 31, 2017	11,886	11,886
Stock-based compensation, Value	$ 227		227
Stock options exercised, Value	447	$ 52	395
Stock options exercised, Shares		522
Net income	2,227			2,227
Ending Balance, Value at Dec. 31, 2018	$ 24,082	$ 1,241	$ 7,063	$ 15,778
Ending Balance, Shares at Dec. 31, 2018	12,408	12,408