Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Common Stock, $1 par value	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Common Stock, Shares, Outstanding	8,833,000
Deferred Tax Expense from Stock Options Exercised	$ 200,000
Balance at beginning of year at Dec. 31, 2016	61,133,000	$ 8,865,000	$ 11,055,000	$ 41,943,000	$ (691,000)	$ (39,000)
Net income (loss)	29,688,000
Adjustment for foreign currency translation	861,000
Stock based compensation	$ 2,006,000		2,006,000
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	56,000
Shares issued		56,000	(56,000)
Treasury Stock, Shares, Acquired	(968)
Share repurchase	$ (20,000)				(20,000)
Balance at end of year at Dec. 31, 2017	$ 93,490,000	8,921,000	13,005,000	71,453,000	(711,000)	822,000
Common Stock, Shares, Outstanding	8,888,028
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (178,000)
Net income (loss)	6,214,000
Adjustment for foreign currency translation	(2,382,000)
Stock based compensation	$ 2,703,000		2,703,000
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	84,000
Shares issued		85,000	(85,000)
Treasury Stock, Shares, Acquired	(16,512)
Share repurchase	$ (523,000)				(523,000)
Balance at end of year at Dec. 31, 2018	$ 99,173,000	$ 9,006,000	$ 15,623,000	77,338,000	$ (1,234,000)	$ (1,560,000)
Common Stock, Shares, Outstanding	8,955,930
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (329,000)			$ (329,000)