CONSOLIDATED BALANCE SHEETS CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Trade receivables, allowances (in dollars)	$ 840	$ 892
STOCKHOLDERS’ EQUITY:
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	42,846,000	42,489,000
Other
OTHER ASSETS:
Intangibles, accumulated amortization (in dollars)	18,870	14,034
Developed technology
OTHER ASSETS:
Intangibles, accumulated amortization (in dollars)	$ 17,602	$ 8,146