Activity in the allowance for doubtful accounts was as follows:
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| Year Ended June 30, | 2013 | 2012 | 2011 | |||||||||
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Balance, beginning of period |
$ | 389 | $ | 333 | $ | 375 | ||||||
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Charged to costs and other |
4 | 115 | 14 | |||||||||
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Write-offs |
(57 | ) | (59 | ) | (56 | ) | ||||||
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Balance, end of period |
$ | 336 | $ | 389 | $ | 333 | ||||||
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