EQUITY INCENTIVE PLANS - Restricted Stock and Additional Disclosures (Details)		3 Months Ended
	Apr. 24, 2017 $ / shares	Mar. 31, 2017 USD ($) item $ / shares shares	Mar. 31, 2016
Number of Shares
Outstanding at beginning of year (in shares) | shares		46,449
Outstanding at end of period (in shares) | shares		30,076
Additional Disclosures
Common Stock, Dividends, Per Share, Declared | $ / shares	$ 0.05
Number of equity incentive plans | item		2
Stock Options
Additional Disclosures
Unrecognized share-based compensation expense related to non-vested options (in dollars)		$ 278,000
Weighted average period for recognition of share-based compensation		3 years	2 years 9 months 18 days
Share-based compensation expense recognized (in dollars)		$ 31,000
Tax benefit from recognized compensation expense (in dollars)		$ 4,000
Restricted stock award
Number of Shares
Outstanding at beginning of year (in shares) | shares		46,449
Vested (in shares) | shares		(16,373)
Outstanding at end of period (in shares) | shares		30,076
Weighted Average Grant Date Value
Outstanding at beginning of year (in dollars per share) | $ / shares		$ 17.00
Vested (in dollars per share) | $ / shares		15.99
Outstanding at end of period (in dollars per share) | $ / shares		$ 17.56
Additional Disclosures
Unrecognized share-based compensation expense related to non-vested restricted stock (in dollars)		$ 511,000
Share-based compensation expense recognized (in dollars)		63,000
Tax benefit from recognized compensation expense (in dollars)		$ 25,000