Debt (Details 3) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Summary of lines of credit
Credit line capacity	$ 19,625
Amount outstanding	13,261	15,195
Itau Bank [Member]
Summary of lines of credit
Interest rate on borrowings	6.66%
Credit line capacity	3,000
Amount outstanding	2,664	2,738
Bank of Chile [Member]
Summary of lines of credit
Interest rate on borrowings	7.50%
Credit line capacity	3,000
Amount outstanding	2,237	2,292
BICE Bank [Member]
Summary of lines of credit
Interest rate on borrowings	5.02%
Credit line capacity	2,000
Amount outstanding	940	2,451
Corp Banca [Member]
Summary of lines of credit
Interest rate on borrowings	5.00%
Credit line capacity	1,000
Amount outstanding	140	1,248
BBVA Bank [Member]
Summary of lines of credit
Interest rate on borrowings	5.55%
Credit line capacity	3,000
Amount outstanding	1,949	2,823
Penta Bank [Member]
Summary of lines of credit
Interest rate on borrowings	9.48%
Credit line capacity	1,000
Amount outstanding	793	833
Security Bank [Member]
Summary of lines of credit
Interest rate on borrowings	7.60%
Credit line capacity	1,500
Amount outstanding	994	0
BCI [Member]
Summary of lines of credit
Interest rate on borrowings	5.00%
Credit line capacity	1,500
Amount outstanding	1,591	0
Estado Bank [Member]
Summary of lines of credit
Interest rate on borrowings	5.99%
Credit line capacity	2,000
Amount outstanding	1,851	1,963
Sabadell Bank [Member]
Summary of lines of credit
Interest rate on borrowings	7.60%
Credit line capacity	195
Amount outstanding	0	3
Bilbao Vizcaya Bank [Member]
Summary of lines of credit
Interest rate on borrowings	4.90%
Credit line capacity	390
Amount outstanding	91	377
Banco Popular [Member]
Summary of lines of credit
Interest rate on borrowings	8.25%
Credit line capacity	390
Amount outstanding	11	260
Santander Bank [Member]
Summary of lines of credit
Interest rate on borrowings	6.00%
Credit line capacity	195
Amount outstanding	0	0
Banesto [Member]
Summary of lines of credit
Interest rate on borrowings	5.80%
Credit line capacity	195
Amount outstanding	0	163
Banca March [Member]
Summary of lines of credit
Interest rate on borrowings	6.25%
Credit line capacity	260
Amount outstanding	$ 0	$ 44