XML 41 R20.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
--- | ---
Dec. 31, 2017
Valuation And Qualifying Accounts [Abstract] |
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS |
(a) (2) | Financial Statement Schedules
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS For the years ended December 31, 2017 and 2016 (in thousands)
|  | Balance at beginning of year |  |  | Additions (A) |  |  | Deductions (B) |  |  | Other (C) |  |  | Balance at end of year |
Allowance for doubtful accounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2017 |  | $ | 167 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 167 |
Year ended December 31, 2016 |  | $ | 797 |  |  | $ | — |  |  | $ | (630 | ) |  | $ | — |  |  | $ | 167 |
| (A) | Includes charges to costs and expenses.
| (B) | Deductions for uncollectible accounts receivable includes payments collected and devices recovered from customers.
| (C) | Miscellaneous activity.

X
- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
Name: | us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ValuationAndQualifyingAccountsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration